For other uses, see Blue (disambiguation)

Blue is one of the three primary additive colors; blue light has the shortest wavelength range (about 420–490 nanometers) of the three additive primary colors. The English language commonly uses "blue" to refer to any color from blue to cyan. Authors of web pages have a variety of options available for specifying colors for elements of web documents. ... The RGB color model utilizes the additive model in which red, green, and blue light are combined in various ways to create other colors. ... Cyan, magenta, yellow, and key (black) CMYK (or sometimes YMCK) is a subtractive color model used in color printing. ... The HSV (Hue, Saturation, Value) model, also called HSB (Hue, Saturation, Brightness), defines a color space in terms of three constituent components: HSV color space as a color wheel Hue, the color type (such as red, blue, or yellow): Ranges from 0-360 (but normalized to 0-100% in some... Look up blue in Wiktionary, the free dictionary. ... Color is an important part of the visual arts. ... Prism splitting light Light is electromagnetic radiation with a wavelength that is visible to the eye (visible light) or, in a technical or scientific setting, electromagnetic radiation of any wavelength. ... The wavelength is the distance between repeating units of a wave pattern. ... A nanometre (American spelling: nanometer, symbol: nm) is 1. ... A primary color (or colour) is a color that cannot be created by mixing other colors in the gamut of a given color space. ... Cyan is a pure spectral color, but the same hue can also be generated by mixing equal amounts of green and blue light. ...

An example of a blue color in the RGB color space has intensities [0, 0, 255] on a 0 to 255 scale. Blue is the complement of yellow. For this reason, blue 80A filters are used to correct for the excessive redness of tungsten lighting in color photography. An RGB color space is any additive color space based on the RGB color model. ... There are two separate but equally valid sets of complementary colors, depending on whether youre referring to additive systems, where light is emitted, or subtractive systems, where (ideally white) light is reflected. ... Yellow is a color with a wavelength 565-590 nanometers. ... In photography, a filter is a camera accessory consisting of an optical filter that can be inserted in the optical path. ... Lens and mounting of a large format camera Wikibooks has more about this subject: Photography Photography is the process of making pictures by means of the action of light. ...

Many languages do not have separate terms for blue and green, and in the Swedish language, blå, the modern word for blue, was used to describe black until the early 20th century. The modern English word blue comes from the Middle English, where it began to be used along with bleu, an Old French word of Germanic origin (possibly Old High German blao, "shining"). A Scots and Scottish English word for "blue-grey" is blae, from the Middle English bla ("dark blue", from the Old English blæd). Look up green in Wiktionary, the free dictionary. ... Swedish ( â–¶(?)) is a North Germanic language (also called Scandinavian languages) spoken predominantly in Sweden and in part of Finland, especially along the coast and on the Ã…land islands, by more than nine million people. ... Black is a color with several subtle differences in meaning. ... (19th century - 20th century - 21st century - more centuries) Decades: 1900s 1910s 1920s 1930s 1940s 1950s 1960s 1970s 1980s 1990s As a means of recording the passage of time, the 20th century was that century which lasted from 1901–2000 in the sense of the Gregorian calendar (1900–1999 in the... Middle English is the name given by historical linguistics to the diverse forms of the English language spoken between the Norman invasion in 1066 and the mid-to-late 15th century, when the Chancery Standard, a form of London-based English, began to become widespread, a process aided by the... Old French is a term sometimes used to refer to the langue doïl, the continuum of varieties of Romance language spoken in territories corresponding roughly to the northern half of modern France and parts of Belgium and Switzerland during the period roughly from 1000 to 1300 A.D... Old High German is the earliest recorded form of the modern German language, and was spoken from the middle of the 9th to the end of the 11th century. ... Scots or Lallans (Eng: Lowlands), often Lowland Scots to distinguish it from the Scottish Gaelic language of the highlands, is a West Germanic language used in Scotland, parts of Northern Ireland, and border areas of the Republic of Ireland, where it is known in official circles as Ulster Scots or... Diagram showing the geographical locations of selected languages and dialects of the British Isles. ... Old English (also called Anglo-Saxon) is an early form of the English language that was spoken in parts of what is now England and southern Scotland between the mid-fifth century and the mid-twelfth century. ...

Sky

A clear sky on a sunny day appears blue because of Rayleigh scattering of the light from the Sun. Large amounts of water appear blue because red light around 750 nm is absorbed as an overtone of the O-H stretching vibration. Interestingly, heavy water is colorless, because the absorption band (~950 nm) is outside the visible spectrum. A typical daytime sky. ... See also Day (language) A day (symbol: d) is a unit of time. ... Rayleigh scattering causing a sunset Rayleigh scattering (named after Lord Rayleigh) is the scattering of light by particles much smaller than the wavelength of the light. ... The Sun (or Sol) is the star at the center of our Solar system. ... Water (from the Old English word wæter; c. ... Heavy water is dideuterium oxide, or D2O or 2H2O. It is chemically the same as normal water, H2O, but the hydrogen atoms are of the heavy isotope deuterium, in which the nucleus contains a neutron in addition to the proton found in the nucleus of any hydrogen atom. ...

Plants and animals

The common bluebell.

Blueberries.

• Blue agave (Agave tequilana var. weber) is a blue-leafed variety of the Mexican agave, used for making tequila.
• Blueback salmon (Oncorhynchus nerka) is a synonym for sockeye salmon.
• Bluebell may refer to both the bulbous plants in the Hyacinthoides genus of lilies, or the plants in the genus Mertensia.
• Blueberry refers to any of the plants in the genus Vaccinium, all of which have flowers with edible berries colored blue to blue-black, which are also called "blueberries."
• Bluebill is a synonym for scaup, the name for two diving ducks in the Aythya genus: Greater Scaup (Aythya marila) and Lesser Scaup (Aythya affinis).
• Bluebirds are any of the North American songbirds in the genus Sialia: Eastern Bluebird (Sialia sialis), Western Bluebird (Sialia mexicana), or Mountain Bluebird (Sialia currucoides). They are medium-sized thrushs that usually have blue plumage and, in males, a rust-color breast.
• Bluebonnets are two lupine annual flowers in the Lupinus genus that are native to Texas: Lupinus subcarnosus and Lupinus texensis. They have a light blue appearance and palmately compound leaves. In Scots it refers to the the bird Parus cœruleus.
• Bluebottles or blow-flies are any of the flies in the genus Calliphiora that have a brightly-colored metallic body and breed in decaying organic material.
• Blue catfish (Ictalurus furcatus) is a long bluish North American catfish species, often weighing more than 45 kg (100 pounds).
• Blue poison dart frogs (Dendrobates azureus) are poisonous South American frogs that bioaccumulate neurotoxins in their blue skin.

A blue dog has a coat color that is primarily "bluish" gray or silver. Examples include the Kerry Blue Terrier with a solid "blue" coat and some Australian Shepherds and Border Collies, which have merle coats. (See also Blue Dog Democrats, below). Download high resolution version (494x604, 94 KB)English bluebell. ... Download high resolution version (494x604, 94 KB)English bluebell. ... Binomial name Hyacinthoides non-scripta (L.) Chouard, 1934 The Common Bluebell (Hyacinthoides non-scripta, sometimes Endymion non-scriptus or Scilla non-scripta) is a spring-flowering bulbous perennial. ... Image File history File links Blueberries from http://www. ... Image File history File links Blueberries from http://www. ... For other uses, see Blueberry (disambiguation). ... Binomial name Agave tequilana A. Weber Ref: ??? The tequila agave Agave Tequilana Weber Azul, often called blue agave, is an agave, a principal economic product of Jalisco state in Mexico due to its role as the base ingredient of tequila, a popular alcoholic drink. ... A variety is a recognised division of a species in botany, next below the rank of subspecies; in zoology, species are only divided into subspecies and never into varieties. ... Various brands of tequila Tequila is a strong distilled alcoholic beverage made primarily in the area surrounding Tequila, a town in the western Mexican state of Jalisco, 50 km from Guadalajara. ... Binomial name Oncorhynchus nerka (Walbaum, 1792) Sockeye Salmon (Oncorhynchus nerka), also called Red Salmon or Blueback Salmon, is an anadromous species of salmon found in the Pacific Ocean. ... Binomial name Oncorhynchus nerka (Walbaum, 1792) Sockeye Salmon (Oncorhynchus nerka), also called Red Salmon or Blueback Salmon, is an anadromous species of salmon found in the Pacific Ocean. ... The term bluebell can refer to the following: English Bluebell (Hyacinthoides non-scripta) or Spanish Bluebell () Bluebell of Scotland (Campanula rotundifolia, called harebell in England) and other Campanula species Virginia Bluebell (Mertensia virginica) Bluebell The name of one of the rabbits in the book Watership Down by Richard Adams BlueBell... Species Hyacinthoides non-scripta Hyacinthoides hispanicus Hyacinthoides is a genus of the Hyacinthaceae (formerly Liliaceae) family. ... In biology, a genus (plural genera) is a grouping in the classification of living organisms having one or more related and morphologically similar species. ... lily is the best name in the whole wide world. ... Mertensia is a genus of plants belonging to the family Boraginaceae. ... Species Vaccinium angustifolium Vaccinium arboreum Vaccinium ashei Vaccinium corymbosum Vaccinium melanocarpum Vaccinium myrsinites Vaccinium myrtilloides Vaccinium occidentalis Vaccinium pallidum Vaccinium tenellum Vaccinium vaccillans Vaccinium virgatum Blueberry refers to some plants of the genus Vaccinium, which also includes cranberries, bilberries (also called blueberry), and many wild shrubs producing edible, round, blue... Species See text Vaccinium is a genus of shrubs in the plant Family Ericaceae including the cranberry, blueberry, lingonberry, bilberry, and huckleberry. ... Several types of berries from the market, but none of these are true berries. ... A scaup can be one of two species of diving duck. ... A scaup can be one of two species of diving duck. ... Genera Marmaronetta Netta (including Rhodonessa) Aythya † See also dabbling duck The 16 species of diving duck, also known as pochards, make up a sub-group of the biological subfamily Anatinae, which itself is part of the diverse and very large duck, goose and swan family, Anatidae. ... Species See text Aythya is a genus of diving ducks Species Canvasback Aythya valisineria Pochard Aythya ferina Redhead Aythya americana Ring-necked Duck Aythya collaris Hardhead Aythya australis Baers Pochard Aythya baeri Ferruginous Duck Aythya nyroca Madagascar Pochard Aythya innotata New Zealand Scaup Aythya novaeseelandiae Tufted Duck Aythya fuligula... Binomial name Aythya marila (Linnaeus, 1761) The Greater Scaup (Aythya marila), or just Scaup in Europe, is a small diving duck. ... Binomial name Aythya affinis (Eyton, 1838) The Lesser Scaup (Aythya affinis) is a small diving duck. ... This article is about the bird. ... The California Condor is one of North Americas most endangered birds. ... Species Sialia sialis Sialia mexicana Sialia currucoides The bluebirds are medium-sized mostly insectivorous or omnivorous birds in the genus Sialia of the thrush family Turdidae. ... Binomial name Sialia sialis (Linnaeus,, 1758) The Eastern Bluebird, Sialia sialis, is a medium-sized thrush found in open woodlands, farmlands and orchards. ... Binomial name Sialia mexicana Swainson,, 1832 The Western Bluebird, Sialia mexicana, is a medium-sized thrush. ... Binomial name Sialia currucoides (Bechstein, 1798) The Mountain Bluebird, Sialia currucoides, is a medium-sized thrush. ... The word thrush can mean more than one thing: Thrush is the common name for the bird family Turdidae. ... This article is about the flower Bluebonnet. ... Lupine may be one of several things: Something that is like, or relating to, a wolf (Canis lupus). ... An annual is a plant that usually germinates, flowers and dies in one year. ... Lupine may be one of several things: Something that is like, or relating to, a wolf (Canis lupus). ... ... Scots or Lallans (Eng: Lowlands), often Lowland Scots to distinguish it from the Scottish Gaelic language of the highlands, is a West Germanic language used in Scotland, parts of Northern Ireland, and border areas of the Republic of Ireland, where it is known in official circles as Ulster Scots or... Subfamilies Calliphorinae Chrysomyiinae Blow-flies (also frequently spelled blow flies or blowflies) are members of the family Calliphoridae of flies (Diptera). ... Binomial name Ictalurus furcatus (Lesueur, 1840) The blue catfish (Ictalurus furcatus) is one of the largest species of North American catfish. ... World map showing North America A satellite composite image of North America North America is a continent in the northern hemisphere bordered on the north by the Arctic Ocean, on the east by the North Atlantic Ocean, on the south by the Caribbean Sea, and on the west by the... Families Catfish (order Siluriformes) are a diverse group of fish. ... Binomial name Dendrobates azureus (Girard, 1855) Dendrobates azureus is a type of poison dart frog found in South America, specifically in the Sipaliwini region of Suriname. ... To bioaccumulate literally means to accumulate in a biological system. ... A neurotoxin is a toxin that acts specifically on nerve cells, or neurons, usually by interacting with membrane proteins and ion channels. ... Trinomial name Canis lupus familiaris (Linnaeus, 1758) The dog is a canine mammal of the Order Carnivora that has been domesticated for at least 24,800 years and perhaps for as long as 150,000 years based on recent evidence. ... Common nickname Kerry Country of origin Ireland Classification and breed standards A Kerry Blue Terrier is a dog breed that comes from Kerry, Ireland. ... Common nicknames Aussie Country of origin United States Classification and breed standards The Australian Shepherd is a herding dog that was developed—despite its name—in the United States in the 19th century. ... A Border Collie is a hard-working herding breed of dog that originated in the border country of England and Scotland. ... Blue merle Border Collie puppy Merle is a colour combination in dogs’ coats. ... Blue Dog Democrats are social and economic conservatives and moderates in the United States Democratic Party. ...

Symbolism and expressions

Picasso's Self-portrait with Cloak (1901)

Blue often denotes injury, such as in the phrase "black and blue," since it is the color of a bruise. Blue is used also as a word to denote a sad or melancholy state, as in depression, or simply a state of deep contemplation (however, the phrase "blue skies," referring to sunny weather, implies cheerfulness). Symbolically, blue is associated with that state, such as the term blue period to describe Pablo Picasso's work form 1901 to 1904. Download high resolution version (782x1083, 107 KB)Picasso autoportrait 1901 The two-dimensional work of art depicted in this image is in the public domain in the United States. ... Download high resolution version (782x1083, 107 KB)Picasso autoportrait 1901 The two-dimensional work of art depicted in this image is in the public domain in the United States. ... A bruise or contusion or ecchymosis is a kind of injury, usually caused by blunt impact, in which the capillaries are damaged, allowing blood to seep into the surrounding tissue. ... It has been suggested that this article or section be merged with clinical depression. ... Self-portrait with Cloak (1901) The Blue Period of Picasso, between 1901 and 1904, was when the style of Pablo Picassos paintings were heavily emotional, often in the form of blue colors. ... Young Pablo Picasso Pablo Ruiz Picasso (Full name) (October 25, 1881 in Málaga, Spain – April 8, 1973) was a Spanish painter and one of the recognized figures in 20th century art, probably most famous as the co-founder, along with Georges Braque, of cubism. ... 1901 (MCMI) was a common year starting on Tuesday (see link for calendar). ... 1904 is a leap year starting on a Friday (link will take you to calendar). ...

• In Australia, a "blue" can also describe a fight or an argument. Men with red hair may be nicknamed "Bluey". The phrase "true blue" also means "genuine" (example : "He's a true blue Aussie").

• A "blue joke" or "blue comedy" is comedy which uses references to socially taboo subjects such as sexual or lavatorial double entendre.

• Blue law is the term for laws regulating issues of morality, such as alcohol, gambling, or pornography.

• Because blue is traditionally the color of heaven, parents once wrapped their baby boys in blue to protect them from demons. Pink was later chosen as the color to associate with girls.

• Blue is the color of the snooker ball which has a 5-point value.

• Blue is a variety of credit card issued by American Express.
• The German word for blue is used for "drunk". "blau machen" (make blue) means to skip work.
• In Russian, the word for light blue is slang for "gay".
• Blue movie is a slang term for a pornographic film. There are also "blue magazines". This term is most common in Britain but also used in the United States and Israel.
• In auto racing, a blue flag advises a car to yield to faster traffic behind.

A taboo is a strong social prohibition (or ban) relating to any area of human activity or social custom declared as sacred and forbidden; breaking of the taboo is usually considered objectionable or abhorrent by society. ... Wikimedia Commons has media related to: Sex positions Inter. ... Flush toilet A toilet is a plumbing fixture devised for the disposal of bodily wastes, including urine, feces, methane, semen and vomit. ... A double entendre or innuendo is a figure of speech similar to the pun, in which a spoken phrase can be understood in either of two ways. ... A blue law, in the United States and Canada, is a type of law restricting activities or sales of goods on Sunday, which had its roots in accommodating Christian Sunday worship, although it persists to this day more as a matter of tradition. ... Aphorism Critical legal studies Jurisprudence Law (principle) Legal research Legal code Natural justice Natural law Philosophy of law Religious law External links Find more information on Law by searching one of Wikipedias sibling projects: Wikibooks Wikiversity has more about this subject: School of Law The Australian Institute of Comparative... ... In general usage, alcohol (from Arabic al-ghawl الغول) refers almost always to ethanol, also known as grain alcohol, and often to any beverage that contains ethanol (see alcoholic beverage). ... Gambling (or betting) is any behavior involving risking money or property (making a wager or placing a stake) on the outcome of a game, contest, or other event in which the outcome of that activity depends partially or totally upon chance or upon ones ability to do something. ... Pornography (from Greek πορνογραφία pornographia — literally writing about or drawings of harlots) (also informally referred to as porn, porno, and more recently, pr0n) is the representation of the human body or human sexual behaviour with the goal of sexual arousal, similar to, but (according to some) distinct from, erotica. ... Michelangelos interpretation of Heaven Heaven is an afterlife concept found in many religions or spiritual philosophies. ... Artists rendition of a demon In religion, folklore, and mythology a demon or demoness is a supernatural being that has generally been described as a malevolent spirit but outside Christian circles was viewed as a sort of elemental spirit: compare Daemon and djinn. ... Pink is a color made by mixing red and white and sometimes described as being a light red, but it is more accurately a bright undersaturated red. ... Snooker table Snooker is a billiards sport that is played on a large (12 X 6) baize-covered table with pockets in each of the four corners and in the middle of each of the long cushions. ... Look up ball in Wiktionary, the free dictionary. ... Credit cards A credit card system is a type of retail transaction settlement and credit system, named after the small plastic card issued to users of the system. ... American Express NYSE: AXP is a diversified global financial services company headquartered in the United States. ... Look up gay in Wiktionary, the free dictionary. ... Slang is the non-standard use of words in a language of a particular social group, and sometimes the creation of new words or importation of words from another language. ... Films are produced by recording actual people and objects with cameras, or by creating them using animation techniques and/or special effects. ... A collection of magazines A magazine is a periodical publication containing a variety of articles. ... Auto racing (also known as automobile racing or motorsport) is a sport involving racing automobiles. ...

Books and written works

A "blue book" is an almanac or similar reference work. For example, the Oregon Blue Book is the official directory and fact repository of the state of Oregon, while the Harvard Bluebook dictates a style of legal citation. The Blue Book is a term for a policy document issued by the Federal Communications Commission in the United States in 1946, urging television networks to uphold their commitment to public service. The Kelley Blue Book is a popular guide used for automobile prices. An almanac (also spelled almanack, especially in Commonwealth English) is an annual publication containing tabular information in a particular field or fields often arranged according to the calendar. ... The Oregon Blue Book is the official directory and fact book for the U.S. state of Oregon. ... State nickname: Beaver State Other U.S. States Capital Salem Largest city Portland Governor Ted Kulongoski (D) Senators Ron Wyden (D) Gordon Smith (R) Official language(s) None Area 255,026 km² (9th)  - Land 248,849 km²  - Water 6,177 km² (2. ... On March 7th, 1946 the Federal Communications Commission issued a report on Public Service Responsibility for Broadcast Licensees, nicknamed The Blue Book, reminding radio and television broadcasters of their commitment to public service. ... The FCCs official seal. ... 1946 (MCMXLVI) was a common year starting on Tuesday. ... A television network is a distribution network for television content whereby a central operation provides programming for many television stations. ... Public services is a term usually used to mean services provided by government to its citizens, either directly (through the public sector) or by financing private provision of services. ... Kelley Blue Book (KBB) is Americas largest appraiser of automobiles. ... A small variety of cars, the most popular kind of automobile. ...

Blue pages are a telephone directory of government offices—either an official blue book or a section of a commercial directory. Compare with the yellow pages or white pages. In telephony, a telephone directory (also called a telephone book) is a listing of telephone subscribers in a geographical area or subscribers to services provided by the organisation that publishes the directory. ... In many countries, the Yellow Pages refers to a telephone directory for businesses organized by the category of product or service. ... A white pages is a telephone directory listing of subscriber names, addresses, and telephone numbers. ...

In The Hitchhiker's Guide to the Galaxy there are so many fabulous references to the Hooloovoo, "a super-intelligent shade of the color blue." The cover of the first novel in the Hitchhikers series, from a late 1990s printing. ... This is a list of races featured in The Hitchhikers Guide to the Galaxy. ...

Prizes

"Blue ribbon" is a term used to describe something of high quality, such as a blue-ribbon panel or a blue-ribbon commission. This comes from the practice of awarding blue ribbons for first place in competitions. The Blue Riband was a notional prize conferred since the 1860s to the ship that made the fastest trans-Atlantic crossing. The first ship actually to fly a blue pennant from her masthead upon winning this was the French liner Normandie in 1936. In symbolism, blue ribbon is a term used to describe something of high quality. ... The Blue Riband is an award held by the ship with the record for a transatlantic crossing. ... 1860 is the leap year starting on Sunday. ...

Math, science, and technology

The "blue screen of death."

• "Big Blue" is a nickname for IBM.

• IBM's chess computer (which defeated chess champion Garry Kasparov) was called Deep Blue.

• Users of Microsoft Windows often use the term "blue" to describe a computer that has encountered a "blue screen of death."

• A blue box is an electronic device with a tone pulsator that simulates a telephone operator's dialing console by replicating the tones used to switch long-distance calls and using them to route the user's own call, bypassing the normal switching mechanism. They were used to avoid charges for telephone calls.

• A "blue chip" is the nickname for a stock that is thought to be safe and in excellent financial shape. In the United States, $1 bills are delivered by the Federal Reserve Bank in blue straps.

• In medical diagrams, blue is used to represent veins carrying deoxygenated blood back to the heart. Deoxygenated blood is actually reddish violet. When a medical patient is not getting enough oxygen or has stopped breathing, however, their skin often takes a blue tint, a condition called cyanosis.

• In astronomy, a blue moon is the second full moon in a calendar month, the third full moon in a season that has four, or a moon that appears blue because of particles in the atmosphere. All are uncommon enough that the expression "once in a blue moon" means "once in a great while" or "infrequently."

Image File history File links Windows_9X_BSOD.png Summary A Windows 9x/Me Blue Screen of Death Moved from Image:Windows XP BSOD.png; the revision history and the discussion page are still there Licensing this proves that microsoft sucks File history Legend: (cur) = this is the current file, (del) = delete... Image File history File links Windows_9X_BSOD.png Summary A Windows 9x/Me Blue Screen of Death Moved from Image:Windows XP BSOD.png; the revision history and the discussion page are still there Licensing this proves that microsoft sucks File history Legend: (cur) = this is the current file, (del) = delete... It has been suggested that this article or section be merged with Red screen of death. ... International Business Machines Corporation (IBM, or colloquially, Big Blue) (NYSE: IBM) (incorporated June 15, 1911, in operation since 1888) is headquartered in Armonk, New York, USA. The company manufactures and sells computer hardware, software, and services. ... The idea of creating a chess-playing machine dates back to the eighteenth century. ... Garry Kasparov Garry Kimovich Kasparov (Га́рри Ки́мович Каспа́ров, pronounced with stress falling on the second syllable: kas-PA-rov) (born April 13, 1963) is a chess grandmaster and is arguably the strongest chess player... Kasparov vs. ... Microsoft Windows refers to a series of operating environments and operating systems created by Microsoft for use on personal computers and servers. ... It has been suggested that this article or section be merged with Red screen of death. ... The blue box previously owned by Steve Wozniak, on display at the Computer History Museum. ... A telephone operator at work on a private switchboard A telephone operator is either a person who provides assistance to a telephone caller, usually in the placing of operator assisted telephone calls such as calls from a pay phone, collect calls (called reversed-charge calls in the UK), calls which... A blue chip stock is the description of the stock of well-established companies having stable earnings and no extensive liabilities. ... See stock (disambiguation) for other meanings of the term stock In financial terminology, stock is the capital raised by a corporation, through the issuance and sale of shares. ... The U.S. one dollar bill ($1) is a denomination of U.S. currency. ... Federal Reserve Districts The United States Federal Reserve System consists of twelve Federal Reserve Banks, each responsible for a particular district, and some with branches. ... In biology, a vein is a blood vessel which returns blood from the microvasculature to the heart. ... Red blood cells (erythrocytes) are present in the blood and help carry oxygen to the rest of the cells in the body Blood is a circulating tissue composed of fluid plasma and cells (red blood cells, white blood cells, platelets). ... The heart and lungs (from an older edition of Grays Anatomy) The heart (Latin cor) is a hollow, muscular organ that pumps blood through the blood vessels by repeated, rhythmic contractions. ... Cyanosis refers to the bluish coloration of the skin due to the presence of deoxygenated hemoglobin in blood vessels near the skin surface. ... Astrometry: the study of the position of objects in the sky and their changes of position. ... The term Blue Moon has at least three different meanings, which are described below. ... The Galileo spacecraft took this composite image on 7 December 1992 on its way to explore the Jupiter system in 1995-97. ...

National, athletic, and university associations

This Israeli flag depicts a blue Star of David on a white background between two blue stripes. The color blue is mandated only as "sky blue," and the shade varies from flag to flag; sometimes it is a dark, almost navy blue, other times it is a very light blue.

Azzurro, a light blue, is the national color of Italy. Blue (along with white) is the national color of Israel and the color is seen on the Israeli flag. Large Flag of Israel File history Legend: (cur) = this is the current file, (del) = delete this old version, (rev) = revert to this old version. ... Large Flag of Israel File history Legend: (cur) = this is the current file, (del) = delete this old version, (rev) = revert to this old version. ... The Star of David The Star of David (Magen David in Hebrew or Mogen Dovid in Ashkenazi Hebrew, Shield of David, Solomons Seal, or Seal of Solomon) is a generally recognized symbol of Judaism and Jewish identity. ... White is a color (more accurately it contains all the colors of the visible spectrum and is sometimes described as an achromatic color—black is the absence of color) that has high brightness but zero hue. ... Flag ratio: 8:11 The flag of Israel was adopted on October 28, 1948, five months after the nations independence. ...

Dark blue is associated with the University of Oxford and light blue with the University of Cambridge. The sporting colors of these universities are called "the blues." The University of Oxford, located in the city of Oxford, England, is the oldest university in the English-speaking world. ... The University of Cambridge is the second-oldest university in the English-speaking world, with one of the most selective sets of entry requirements in the United Kingdom. ...

A specific shade of dark blue is associated with Yale University. Blue Devils are the mascot of many American universities; Duke University's blue devils are the most famous but other universities with the mascot include Central Connecticut State University, Dillard University, Lawrence Technological University, State University of New York at Fredonia, and the University of Wisconsin-Stout. Yale University is a private university in New Haven, Connecticut. ... The Blue Devils were a group of French soldiers who fought in World War I (French: les Diables Bleus) The Blue Devils were a legendary Kansas City jazz band led by bass player Walter Page in the 1920s and 1930s. ... Blue Devils is the mascot for Duke Universitys athletic teams. ... Central Connecticut State University is a state university in New Britain, Connecticut. ... Dillard University is a private, faith based liberal arts college in New Orleans, Louisiana. ... Lawrence Technological University is a university located in Southfield, Michigan. ... The State University of New York at Fredonia, also known as SUNY Fredonia and the State University of New York College at Fredonia, is a four-year liberal arts college located in Fredonia, Chautauqua County, New York. ... The University of Wisconsin-Stout was founded as an experiment in industrial education and manual training in 1891 and has more than 8,000 students. ...

The Columbus Blue Jackets are a National Hockey League team based in Columbus, Ohio. The Blue Jays are the mascots of the Toronto Blue Jays, a Major League Baseball team, and its two minor league affilates: the Dunedin Blue Jays in Dunedin, Florida, and the Pulaski Blue Jays in Pulaski, Virginia. The Columbus Blue Jackets are a National Hockey League team based in Columbus, Ohio. ... The modernized NHL shield logo, debuting in 2005. ... Columbus is the capital of the U.S. state of Ohio. ... State nickname: The Buckeye State Official languages None Capital Columbus Largest city Columbus (largest metropolitan area is Cleveland) Governor Bob Taft (R) Senators Mike DeWine (R) George V. Voinovich (R) Area  - Total  - % water Ranked 34th 116,096 km² 8. ... The term Blue Jay can refer to: Blue Jay, a species of bird. ... Major league affiliations American League (1977-present) East Division (1977-present) Major league titles World Series titles (2) 1993 â€¢ 1992 AL Pennants (2) 1993 â€¢ 1992 East Division titles (5) 1993 â€¢ 1992 â€¢ 1991 â€¢ 1989 1985 Wild card berths (0) None Major league nicknames Toronto Blue Jays (1977-present) Major league home... MLB logo Major League Baseball (MLB) is the highest level of play in professional baseball in the world. ... A Class A California League game in San Jose, California (1994) Minor baseball leagues are North American professional baseball leagues that compete at a level below that of Major League Baseball. ... The Dunedin Blue Jays are a minor league baseball team based in Dunedin, Florida. ... Dunedin, Florida Dunedin is a city located in Pinellas County, Florida. ... State nickname: Sunshine State Other U.S. States Capital Tallahassee Largest city Jacksonville (largest metropolitan area is Miami) Governor Jeb Bush (R) Senators Bill Nelson (D) Mel Martinez (R) Official language(s) English Area 170,451 km² (22nd)  - Land 137,374 km²  - Water 30,486 km² (17. ... The Pulaski Blue Jays are a professional minor league baseball team in the Appalachian League. ... Pulaski is a town located in Pulaski County, Virginia. ... State nickname: Old Dominion Other U.S. States Capital Richmond Largest city Virginia Beach Governor Mark R. Warner (D) Tim Kaine (D-Governor Elect) Senators John Warner (R) George Allen (R) Official language(s) English Area 110,862 km² (35th)  - Land 102,642 km²  - Water 8,220 km² (7. ...

Social class and occupation

Blue may denote the working class, derived from the traditional color of factory uniforms. Blue-collar workers are industrial workers and are often contrasted white-collar office workers. However, in contrast to "blue collar," the phrase "blue blood" is used to mean "from an aristocratic background," because pale, untanned skin–a sign of notablity–allows blue-tinged veins to show through. The term working class is used to denote a social class. ... This page describes uniform in the sense of clothing. ... A blue-collar worker is a working class employee who performs manual or technical labor, such as in a factory or in technical maintenance trades, in contrast to a white-collar worker, who does non-manual work generally at a desk. ... White-collar workers perform tasks which are less laborious yet often more highly paid than blue-collar workers, who do manual work. ... The Ancient Greek term aristocracy meant a system of government with rule by the best. This is the first definition given in most dictionaries. ...

Several vocations are associated with blue. Law enforcement, and uniformed police, often wear blue uniforms and have become associated with the color, as seen in phrases such as "boys in blue," "blue line," and "blue wall." Most police cars have blue colors, and United Nations peacekeepers are uniformed in blue and white. "Bluecoat" (akin to "redcoat") refers to a uniformed police officer. Police in the People's Republic of China changed the color of their uniforms from green to blue in the late 1990s, partly to emphasize their civilian role. Since laws prohibit police from declaring a strike, the "blue flu" is a "sickout": a type of strike action in which police call in sick. For the band, see The Police. ... A London Metropolitan Police car A police car, police cruiser, squad car, or patrol car is a vehicle used by police forces around the world to patrol, temporarily detain and transport individual prisoners. ... This law-related article does not cite its references or sources. ... Norwegian Blue Helmet during the Siege of Sarajevo, 1992 - 1993, photo by Mikhail Evstafiev. ... Scarlet is a color with a hue between red and orange. ... Look up green in Wiktionary, the free dictionary. ... The 1990s refers to the years 1990 to 1999; the last decade of the 20th Century. ... A sickout is a type of strike action in which the strikers call in sick. ... Striking Teamsters defend themselves with pipes against armed police in the streets of Minneapolis, 1934. ...

Blue is associated with many air forces and navies because of the color of their dress uniforms, while green is associated with armies. Navy blue is a particular shade of blue worn by sailors in the Royal Navy since 1748 and subsequently adopted by other navies around the world. The Blue Angels are an acrobatic flight squadron of the U.S. Navy. An air force is a military organization that primarily operates in air-based war. ... A rare occurrence of a 5-country multinational fleet, during Operation Enduring Freedom in the Oman Sea. ... Army (from French armée) can, in some countries, refer to any armed force. ... Navy blue is an especially dark shade of blue. ... The Royal Navy of the United Kingdom is the senior service of the British armed services, being the oldest of its three branches. ... Events April 24 - A congress assembles at Aix-la-Chapelle with the intent to conclude the struggle known as the War of Austrian Succession - at October 18 - The Treaty of Aix-la-Chapelle is signed to end the war Adam Smith begins to deliver public lectures in Edinburgh Building of... US Navy Blue Angels in tight diamond formation. ... The United States Navy (USN) is the branch of the United States armed forces responsible for naval operations. ...

Politics

Logo of the congressional Blue Dog Democrats.

main article: Political colour Image File history File links Bdoglogo. ... Image File history File links Bdoglogo. ... Blue Dog Democrats are social and economic conservatives and moderates in the United States Democratic Party. ... This article needs to be cleaned up to conform to a higher standard of quality. ...

Blue, like white, may represent authority as opposed to revolutionary red or black. White is a color (more accurately it contains all the colors of the visible spectrum and is sometimes described as an achromatic color—black is the absence of color) that has high brightness but zero hue. ... It has been suggested that this article or section be merged into Revolutions. ... Red is a color poo the lowest frequencies of light discernible by the human eye. ... Black is a color with several subtle differences in meaning. ...

During the American Civil War, blue was used to represent the Union while gray represented the Confederacy. This representation was based on the uniforms worn by the respective armies, although uniforms remained non-standard thoughout the war and sometimes the colors were switched. The American Civil War (1861–1865) was fought in North America within the United States of America, between twenty-four mostly northern states of the Union and the Confederate States of America, a coalition of eleven southern states that declared their independence and claimed the right of secession from the... Map of the division of the states during the Civil War. ... The word gray is also spelled grey: see Grey for topics with this spelling. ... Motto: Deo Vindice (Latin: With God As Our Vindicator) Anthem: God Save the South (unofficial) Dixie (popular) Capital Montgomery, Alabama February 4, 1861–May 29, 1861 Richmond, Virginia May 29, 1861–April 9, 1865 Danville, Virginia April 3–April 10, 1865 Largest city New Orleans February 4, 1861 until captured...

Internationally, blue is the symbol for conservatism and conservative political parties. There are several notable exceptions and different meanings.: Conservatism is any of a number of political philosophies supporting traditional values or an established social order. ... A political party is a political organization that subscribes to a certain ideology and seeks to attain political power within a government. ...

• In the United States, since the 2000 presidential election, blue represents the center-left Democratic Party, and "blue states" are states that tend to favor the Democrats. (The rival rightist Republicans became associated with red, and states that favor the Republicans are "red states." Prior to 2000, electoral maps either used blue to represent the incumbent and red for the challenger, or alternated. Each party uses all national color (red, white, and blue) in official materials. The Blue Dog Democrat coalition is a caucus of moderate Democrats in Congress.
• In Puerto Rico, blue is the color of the National Progressive Party, which favors statehood.
• In the United Kingdom and Canada, blue represents the Conservative Party and Conservative Party of Canada, respectively.
• In Australia, blue traditionally represents the conservative Liberal Party.
• In Germany, blue and yellow are the colors of the liberal Free Democratic Party.
• In Paraguay, blue is the color of the Authentic Radical Liberal Party.
• In the Republic of China (Taiwan), blue is the symbol for the Kuomintang and is associated with the Pan-Blue Coalition of parties that support Chinese reunification.

Presidential electoral votes by state. ... The examples and perspective in this article do not represent a worldwide view. ... The Democratic Party is one of the two major political parties in the United States. ... ... It has been suggested that Far-right be merged into this article or section. ... The Republican Party, often called the GOP (for Grand Old Party, although one early citation described it as the Gallant Old Party) [1], is one of the two major political parties in the United States. ... Red is a color poo the lowest frequencies of light discernible by the human eye. ... Red states and blue states are those U.S. states having residents who predominantly vote for the Republican Party or Democratic Party, respectively, in elections in the United States. ... Blue Dog Democrats are social and economic conservatives and moderates in the United States Democratic Party. ... A caucus is most generally defined as being a meeting of supporters or members of a political party or movement. ... Seal of the Congress. ... There are a number of National Progressive Parties in the world: National Progressive Party (Finland) National Progressive Party (Kiribati) National Progressive Party (Lesotho) National Progressive Party (Montserrat) National Progressive Party (Namibia) National Progressive Party (USA) This is a disambiguation page — a list of pages that otherwise might share the same... This article discusses states as sovereign political entities. ... The Conservative Party is the largest political party on the right-of-centre in the United Kingdom. ... The Conservative Party of Canada (French: Parti conservateur du Canada) is a right-of-centre political party in Canada, formed by the merger of the Canadian Alliance and the Progressive Conservative Party of Canada in December 2003. ... Yellow is a color with a wavelength 565-590 nanometers. ... Liberalism is an ideology, or current of political thought, which strives to maximize liberty through individual rights. ... Categories: Politics stubs | Liberal related stubs | German political parties | Liberal parties ... This article is part of or related to the Liberalism series Categories: Politics stubs | Liberal related stubs | Liberal parties | Paraguayan political parties ... The Republic of China (ROC) currently has jurisdiction over Taiwan, Kinmen, Matsu, and the Pescadores Islands (Penghu) and several smaller islands. ... The Chinese Nationalist Party (Traditional: 中國國民黨; Simplified: 中国国民党; pinyin: ; Wade-Giles: Chung-kuo Kuo-min-tang; Tongyong Pinyin: Jhongguo Guomindang), commonly known as the Kuomintang (KMT), is a conservative political party currently active in the Republic of China (ROC) on Taiwan. ... The Pan-Blue Coalition, or Pan-Blue Force (Chinese: 泛藍軍; pinyin: fàn lán jūn), is a political coalition in early 21st century Taiwan, consisting of the Kuomintang (KMT), the People First Party (PFP), and the smaller New Party (CNP). ... Chinese reunification is a goal of Chinese nationalism which is the unification of all of China under a single political entity. ...

Television

Blue is the color and name of the main character in the preschool animated television show Blue's Clues. toys made in Blue and Periwinkles image Blues Clues is a daytime childrens show which airs on Nickelodeon. ...

On Star Trek, medical and scientific personnel wear blue uniforms. http://www. ...

On Foster's Home For Imaginary Friends, there is a character named Blooregard Q. Kazoo, more commonly named Bloo, and pronounced blue. He is a blue bloblike imaginary friend. Fosters Home for Imaginary Friends is an animated television program created and produced by animator Craig McCracken, who also created The Powerpuff Girls. ...

Music

Blues is a music genre. A blue note is a note between the regular notes on the scale. Blue notes are the most important notes in the blues scale. The blues is a vocal and instrumental form of music based on a pentatonic scale as well as a characteristic twelve-bar chord progression. ... A music genre is a category (or genre) of pieces of music that share a certain style or basic musical language (van der Merwe 1989, p. ... In jazz and blues notes added to the major scale for expressive quality, loosely defined by musicians to be an alteration to a scale or chord that makes it sound like the blues. ... In music, a pentatonic scale is a notes per octave. ...

Bands called "Blue" include two British musical groups: the rock group Blue and the boy band Blue. Blue is the title of an album by the Canadian singer-songwriter Joni Mitchell, and Kind of Blue is the title of an album by Miles Davis, one of the world's best-selling jazz recordings. A boy band (American English) or boyband (British English) is a style of pop group featuring between three and six young male singers who are usually also dancers. ... Blue was a British boy band consisting of four members: Lee Ryan, Duncan James, Antony Costa, and Simon Webbe. ... Self portrait by Joni Mitchell, on the cover of her album Both Sides Now Joni Mitchell, CC (born Roberta Joan Anderson on November 7, 1943, in Fort Macleod, Alberta), is a legendary Canadian musician and painter. ... Kind of Blue is a 1959 album by jazz musician Miles Davis (see 1959 in music). ... Davis 1959 album Kind of Blue, likely the best-selling jazz album ever. ... Jazz master Louis Armstrong remains one of the most loved and best known of all jazz musicians. ...

Blue Train is an influential jazz album by John Coltrane. Rhapsody in Blue is a symphonic jazz composition for jazz band, piano, and orchestra by George Gershwin, while Love is Blue is a popular tune from the 1960s by Andy Williams, most notably performed by Paul Mauriat. Blue Train is a jazz album by John Coltrane, released in 1957 (see 1957 in music. ... John Coltrane John William Coltrane (September 23, 1926 – July 17, 1967) was an American jazz saxophonist and composer. ... Rhapsody in Blue is a composition by George Gershwin which combines elements of classical music with jazz-influenced effects. ... George Gershwin photograph by Edward Steichen in 1927. ... The 1960s in its most obvious sense refers to the decade between 1960 and 1969, but the expression has taken on a wider meaning over the past twenty years. ... Andy Williams This page is about the singer. ... Paul Mauriat Paul Mauriat (born March 4, 1925) in Marseille, France) is a French orchestra leader, specializing in light music. ...

"Blue" has been used as a song title by many artists, notably LeAnn Rimes and Eiffel 65. Cristian Castro's song "Azul" (Spanish for "blue") repeats the line "This love is blue as the sea" (Este amor es azul como el mar). LeAnn Rimes performing Margaret LeAnn Rimes (born August 28, 1982) is a popular American country music singer. ... Eiffel 65 Eiffel 65 is a trio of Italian musicians (from Turin, Italy) who play mostly eurodance and electronic music. ... Christian Castro (born December 8, 1974 as Cristian Saechz Valdes) is an international pop singer who is a native of Mexico City, Mexico. ...

Other songs which use the word blue include:

• "We the People Who Are Darker than Blue" by Curtis Mayfield, appearing on his debut album
• "Blue Room in Archway" and "Song from the Blueroom" by The Boo Radleys, both appearing on the album Kingsize
• "For You Blue" by The Beatles, appearing on the album Let It Be
• "Blue Savannah" by Erasure, appearing on the album Wild!
• "Dark Blue" by No Doubt, the last track on their album "Return of Saturn"
• "Blue" by Yoko Kanno, featured in hit Japanese anime Cowboy Bebop

Curtis Mayfield (June 3, 1942 – December 26, 1999) was an African American soul, funk and R&B singer, songwriter and guitarist probably best known for his soundtrack to the blaxploitation film Superfly. ... Track listing (Dont Worry)If Theres a Hell Below, Were All Going to Go (Mayfield) - 7:49 The Other Side of Town (Mayfield) - 4:01 The Makings of You (Mayfield) - 3:43 We the People Who are Darker than Blue (Mayfield) - 6:05 Move on Up (Mayfield... The Boo Radleys were a British guitar band of the 1990s who made experimental indie music, and were briefly associated with the Britpop movement. ... A double bed A bed is a piece of furniture or location primarily used or intended for sleeping upon, but also commonly used for sexual activities, and for relaxing, sitting and reading. ... The Beatles were a British pop and rock group from Liverpool, England. ... ‹The template below has been proposed for deletion. ... Clarke (L) and Bell Erasure is a British synth pop duo band consisting of keyboardist Vince Clarke and singer Andy Bell. ... No Doubt is an American alternative rock band whose music was initially influenced heavily by ska, punk and New Wave. ... Return of Saturn is the fourth album by ska punk band No Doubt, released in 2000 (see 2000 in music). ...

Use in painting

Traditionally, blue has been considered a primary color in painting, with the secondary color orange as its complement, but this is not consistent with modern scientific color theory. As the mixing of pigments is a subtractive color process, the true primary colors in painting and printing are cyan, magenta and yellow (with black often added for practical reasons; see CMYK color model). See also Orange (disambiguation) for other meanings of the word. ... Subtractive color explains the theory of mixing paints, dyes, inks, and natural colorants to create colors which absorb some wavelengths of light and reflect others. ... Cyan is a pure spectral color, but the same hue can also be generated by mixing equal amounts of green and blue light. ... Magenta is a color that is not a spectral color: that is to say, the hue cannot be generated by light of a single wavelength. ... Yellow is a color with a wavelength 565-590 nanometers. ... Cyan, magenta, yellow, and key (black) CMYK (or sometimes YMCK) is a subtractive color model used in color printing. ...

Variations

• Azure
• Aquamarine
• Alice-Blue
• Turquoise
• Cornflower blue
• Sky blue
• Royal blue
• Midnight blue

Categories: Stub | Colors ... Aquamarine is a color, a shade between green and blue. ... It is said that the name of the color is due to the choice in the wardrobe of Alice Roosevelt Longworth. ... Turquoise is a mid-value color blend of blue and green. ... Cornflower blue is a shade of light blue with relatively little green compared to blue. ... Wonderful Days is a Korean animated science fiction film, released in 2003. ... Royal blue is a lighter shade of blue. ... Midnight Blue is a dark shade of blue that was named for its darkness. ...

Blue pigments

• Azurite
• Cerulean blue
• Cobalt blue
• Phthalocyanine blue
• Prussian blue
• Ultramarine

Azurite Azurite ground as a pigment Azurite crystals Azurite is a carbonate mineral with chemical composition Cu3(CO3)2(OH)2, (copper carbonate hydroxide). ... Cerulean blue is a cerulean (light blue or azure) pigment used in artistic painting. ... Cobalt blue is a cool, slightly desaturated blue, historically made using cobalt salts (cobalt is an elemental metal). ... This article needs to be cleaned up to conform to a higher standard of quality. ... Prussian blue (Preussisch Blau, Berliner Blau) is a dark blue pigment used in paints and formerly in blueprints. ... Natural ultramarine. ...

See also

• Distinguishing "blue" from "green" in language
• List of colors
• Lapis lazuli

The English language makes a distinction between blue and green, but some languages, such as Vietnamese or Tarahumara usually do not use separate words for green and refer to that colour using a word that can also refer to yellow or to blue. ... The following is a partial list of colors with associated articles. ... A block of lapis lazuli Lapis lazuli is one of the oldest of all gems, with a history of use stretching back 7,000 years. ...

External links

Look up blue in Wiktionary, the free dictionary.

• Is water blue? The absorption spectrum of water in the visible range

Wikipedia does not have an article with this exact name. ... Logo en:Wiktionary Wiktionary is a sister project to Wikipedia intended to be a free wiki dictionary (including thesaurus and lexicon) in every language. ...