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The irises of human eyes exhibit a wide spectrum of colours. Eye color is a polygenic phenotypic trait determined by two factors: the pigmentation of the eye's iris [1] [2] and the frequency-dependence of the scattering of light by the turbid medium in the stroma of the iris.
Young was the first to measure the wavelengths of different colors of light, in 1802. [16] The connection between the visible spectrum and color vision was explored by Thomas Young and Hermann von Helmholtz in the early 19th century. Their theory of color vision correctly proposed that the eye uses three distinct receptors to perceive color.
The color or name comes from the French word cerise, meaning "cherry". According to the Oxford English Dictionary, the first recorded use of cerise as a color name in English was in The Times of November 30, 1858. [2] This date of 1858 as the date of first use of the color name is also mentioned in the 1930 book A Dictionary of Color. [3]
Colors are an important part of visual arts, fashion, interior design, and many other fields and disciplines. The following is a list of colors. A number of the color swatches below are taken from domain-specific naming schemes such as X11 or HTML4. RGB values are given for each swatch because such standards are defined in terms of the sRGB ...
According to the logic of the RGB color wheel, indigo colors are those colors with hue codes between 255 and 225 (degrees), azure colors are those colors with hue codes between 195 and 225, and cyan colors are those colors with hue codes between 165 and 195. Another way of describing it could be that cyan is a mixture of blue and green light ...
Plum is a purple color with a brownish-gray tinge, like that shown on the right, or a reddish purple, which is a close representation of the average color of the plum fruit. As a quaternary color on the RYB color wheel, plum is an equal mix of the tertiary colors russet and slate. [2] [3] The first recorded use of plum as a color name in ...
It is able to store a wider range of color values than sRGB. The Wide Gamut color space is an expanded version of the Adobe RGB color space, developed in 1998. As a comparison, the Adobe Wide Gamut RGB color space encompasses 77.6% of the visible colors specified by the Lab color space, whilst the standard Adobe RGB color space covers just 50.6%.
This can only be used as a very rough guide, for instance if a narrow range of wavelengths within the band 647–700 nm is absorbed, then the blue and green receptors will be fully stimulated, making cyan, and the red receptor will be partially stimulated, diluting the cyan to a greyish hue.