Azure (color)

Azure
 
    Color coordinates
Hex triplet #007FFF
sRGBB  (r, g, b) (0, 127, 255)
HSV       (h, s, v) (210°, 100%, 100%)
Source On the RGB color wheel, Azure is defined as the colour halfway between blue and cyan. The colour halfway between blue and cyan on the RGB color wheel has a hex code of 007FFF.[1]
B: Normalized to [0–255] (byte)
Azure pigment

Azure (/ˈæʒər, ˈæz.jʊər/ AZH-ər, AZ-yoor)[2] is a variation of blue that is often described as the color of the sky on a clear day.

On the RGB color wheel, "azure" (hexadecimal #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 or white cyan.

Etymology

A slab of lapis lazuli, the mineral from which azure took its name

The color azure ultimately takes its name from the intense blue mineral lapis lazuli. Lapis is the Latin word for "stone" and lāzulī is the genitive form of the Medieval Latin lāzulum, which is taken from the Arabic لازورد lāzaward, itself from the Persian لاژورد lāžaward, which is the name of the stone in Persian[3] and also of a place where lapis lazuli was mined.[4][5]

The name of the stone came to be associated with its color. The French azur, the Italian azzurro, the Polish lazur, Romanian azur and azuriu, the Portuguese and Spanish azul, Hungarian azúr, and the Catalan atzur, 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 brooch, gold and azure).[6][7][8]

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.[9]

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.

Distinction between indigo, azure and cyan

All of the colors shown below in the section variations of azure are referenced as having a hue code of between 195 and 225 (the hue code is the h code in the HSV color space), signifying that these colors are tones of azure. The only exception, as noted below, is the web color azure which, with a color code of 180, is actually a tone of cyan.

Strictly speaking, according to the mathematical logic of the RGB color wheel, indigo colors are those colors with hue codes of between 255 and 225, azure colors are those colors with hue codes of between 195 and 225, and cyan colors are those colors with hue codes of between 165 and 195.

Azure in nature

Insects
Birds

In culture

See also

References

  1. ↑ On colour plate 33 (page 89) of the 1930 book A Dictionary of Color by Maerz and Paul, the colours on the right side of colour plate 33 from top to bottom represent the most highly saturated colours on the color wheel from cyan to azure, and the colours on the bottom of colour plate 33 from right to left represent the most highly saturated colours on the colour wheel from azure to blue. The colour sample that represents azure is colour sample L12 on Plate 33 on Page 89. See reference to Azure on Page 190 in the index. See also discussion of the color azure, Page 149.
  2. ↑ Oxford Dictionary Online, Oxford US Dictionary
  3. ↑ Oxford English Dictionary
  4. ↑ Senning, Alexander (2007). "lapis lazuli (lazurite)". Elsevier's Dictionary of Chemoetymology. Amsterdam: Elsevier. p. 224. ISBN 978-0-444-52239-9.
  5. ↑ Weekley, Ernest (1967). "azure". An Etymological Dictionary of Modern English. New York: Dover Publications. p. 97.
  6. ↑ "azure, n. and adj". Oxford English Dictionary. OUP. Retrieved 21 April 2011.
  7. ↑ Chaucer, Geoffrey. "The Project Gutenberg EBook of Troilus and Criseyde". Troilus and Criseyde. Project Gutenberg. Retrieved 21 April 2011.
  8. ↑ 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).
  9. ↑ Rutherford J. Gettens and George L. Stout (1942) Painting Materials: A Short Encyclopedia, New York: Van Nostrand
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