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(詳細はvariation of blue that is often described as the color of the sky on a clear summer's day. On the RGB color wheel, "azure" (color #007FFF) is defined as the color at 210 degrees, i.e., the hue halfway between blue and cyan. In the RGB color model, used to create all the colors on a television or computer screen, azure is created by adding a little green light to blue light. The complementary color of azure is orange. In the X11 color system which became a standard for early web colors, azure is depicted as a pale cyan color. ==Etymology== The color azure ultimately takes its name from the intense blue mineral lapis lazuli. ''ラテン語:Lapis'' is the Latin word for "stone" and ''ラテン語:lazuli'' is the genitive form of the Medieval Latin ''ラテン語:lazulum'', which is taken from the Arabic ''lāzaward'', itself from the Persian ''lāžaward'', which is the name of the stone in Persian〔''Oxford English Dictionary''〕 and also of a place where lapis lazuli was mined. The name of the stone came to be associated with its color. The French ''フランス語:azur'', the Italian ', the Polish ', Romanian ' and ', and the Portuguese and Spanish ', Hungarian ' all come from the name and color of lapis lazuli. The word was adopted into English from the French, and the first recorded use of it as a color name in English was in 1374 in Geoffrey Chaucer's work Troilus and Criseyde, where he refers to "a broche, gold and ''asure''" (a broach, gold and azure).〔Maerz and Paul ''A Dictionary of Color'' New York:1930 McGraw-Hill Page 190. Also (Azure @ Dictionary.Reference.com ). Also (Azur @ CNRTL.fr (in french) ).〕 In Russian, "голубой" (''goluboj'', azure or cyan) and "синий" (''sinij'', blue or navy blue) are not two shades of the same color, but distinguished in the way red and pink are distinct colors in English. A similar distinction exists between "celeste" or "azzurro" (azure, but used to indicate shades of light blue) and "blu" (blue) in Italian and "ฟ้า (''fah'', sky blue) and น้ำเงิน (''nam ngoen'', blue) in Thai. Azure also describes the color of the mineral azurite, both in its natural form and as a pigment in various paint formulations. In order to preserve its deep color, azurite was ground coarsely. Fine-ground azurite produces a lighter, washed-out color. Traditionally, the pigment was considered unstable in oil paints, and was sometimes isolated from other colors and not mixed. Modern investigation of old paintings, however, shows that the pigment is very stable unless exposed to sulfur fumes.〔Rutherford J. Gettens and George L. Stout (1942) ''Painting Materials: A Short Encyclopedia'', New York: Van Nostrand〕 The use of the term spread through the practice of heraldry, where “azure” represents a blue color in the system of tinctures. In engravings, it is represented as a region of parallel horizontal lines, or by the abbreviation ''az.'' or ''b.'' In practice, azure has been represented by any number of shades of blue. In later heraldic practice a lighter blue, called bleu celeste (“sky blue”), is sometimes specified. 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「Azure (color)」の詳細全文を読む スポンサード リンク
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