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Cyan ( or 〔(【引用サイトリンク】title=''Cyan'' definition on dictionary.com )〕) is a greenish-blue color.〔(【引用サイトリンク】title=Cyan - Definition and More from the Free Merriam-Webster Dictionary )〕〔''Shorter Oxford English Dictionary'', 5th Edition, Oxford University Press, 2002.〕 On the color wheels of the RGB (additive) and CMYK (subtractive) color models, it is located midway between blue and green, making it the complementary color of red. Its name is derived from the Ancient Greek κυανός, transliterated ''kýanos'', meaning "dark blue".〔(【引用サイトリンク】title=Online Etymology Dictionary )〕〔(【引用サイトリンク】title=Henry George Liddell, Robert Scott, A Greek-English Lexicon, κύα^νος )〕 It was formerly known as "cyan blue" or cyan-blue,〔''Shorter Oxford English Dictionary'', 5th edition.〕 and its first recorded use of as a color name in English was in 1879.〔Maerz and Paul ''A Dictionary of Color'' New York:1930 McGraw-Hill page 194〕 Further origins of the color name can be traced back to a dye produced from the cornflower (''Centaurea cyanus'').〔''The Pigment Compendium: A Dictionary of Historical Pigments'', Nicholas Eastaugh, Valentine Walsh, Tracey Chaplin, Ruth Siddall, 2004, Routledge, ISBN 9781136373855〕 The web color cyan is synonymous with aqua. In most languages, 'cyan' is not a basic color term and it phenomenologically appears as a greenish vibrant hue of blue to most English speakers. Reasons for why cyan is not linguistically acknowledged as a basic color term can be found in the frequent lack of distinction between blue and green in many languages. Some varieties in the cyan color range are teal, turquoise, electric blue, aquamarine, and other colors described as blue-green. In the CMYK color model, used in color printing, cyan is one of the primary colors, along with magenta, yellow, and black, which can be overlaid to produce all colors in the CMYK color model. In the additive color system, or RGB color model, used to create all the colors on a computer or television display, cyan is made by mixing equal amounts of green and blue light. Since it is the complement of red, it can also be made by the removal of red from white light. Mixing red light and cyan light at the right intensity on a black screen will make white. Cyan light has a wavelength of between 490 and 520 nanometers, between the wavelengths of blue and green. ==Gallery== File:RGB illumination.jpg|In the RGB color model, used to make colors on computer and TV displays, cyan is created by the combination of green and blue light. File:RBG color wheel.svg|In the RGB color wheel of additive colors, cyan is midway between blue and green. File:SubtractiveColor.svg|In the CMYK color model, used in color printing, cyan, magenta and yellow combined make black. In practice, since the inks are not perfect, some black ink is added. File:Refill Ink Kit Color crop.jpg|Color printers today use magenta, cyan, and yellow ink to produce the full range of colors. File:Komplementärfarben cyan auf rot.png|Cyan and red are complementary colors. They have strong contrast and harmony, and if combined, they make either white, black or grey, depending upon the color system used. File:Wham-a different corner.jpg|Cyan is the color of shallow water over a sandy beach. The water absorbs the color red from the sunlight, leaving a greenish-blue color. Samarkand05.jpg|The dome of the Tilla Kari Mosque in Samarkand, Uzbekistan (1660) is cyan. The color is widely used in architecture in Turkey and Central Asia. File:Uranus2.jpg|The planet Uranus. seen from the Voyager 2 spacecraft. The cyan color comes from clouds of methane gas in the planet's atmosphere. File:Wirbelsäulenoperation OKM.jpg|A surgical team in Germany. Surgeons and nurses often wear gowns colored cyan, and operating rooms are often painted that color, because it is the complement of red and thus reduces the desensitization to red that occurs when working on blood red internal organs.〔"In the 20th century an influential doctor switched to green because he thought it would be easier on a surgeon's eyes...Green may be especially well-suited to help doctors see better because it is the opposite of red on the color wheel." (Livescience.com).〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「cyan」の詳細全文を読む スポンサード リンク
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