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Cornflower blue is a shade of medium-to-light blue containing relatively little green. This hue was one of the favorites of the Dutch painter Johannes Vermeer. [1] Cornflower blue sapphire. The most valuable blue sapphires are called cornflower blue, having a medium-dark violet-blue hue. [2]
Vacuolar pH influence on flower colour: pH theory was the first concept, that tried to explain the mystery of blue colour formation in flower petals. First observation showed that cyanine extracted from blue cornflower changes the colour in aqueous solution in different pH. In the acidic range pigment was red but in alkaline solution was blue.
Robin's Egg Blue #00CCCC 0 204 204 1993–present No No No Yes Yes Yes Teal Blue #008080 0 128 128 1990–2003 Light Blue #8FD8D8 143 216 216 1958 Aquamarine #95E0E8 149 224 232 1949–present Known as "Light Turquoise Blue", 1949–1958. [2] No No No No No Yes Turquoise Blue #6CDAE7 108 218 231 1935–present Available only in bulk, 1935 ...
Protocyanin is an anthocyanin pigment that is responsible for the red colouration of roses, but in cornflowers is blue. The pigment was first isolated in 1913 from the blue cornflower (Centaurea cyanus), [1] and the identical pigment was isolated from a red rose in 1915. [2]
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The Printer Working Group (PWG) of the IEEE publishes a standard, PWG 5101.1, whose mandatory color names are based upon RFC 3805, successor to RFC 1759 which imported the functional color names other, unknown and transparent alongside seven basic colors from ISO 10175 and ISO 10180 , and JTAPI. [18]