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  2. Color blindness - Wikipedia

    en.wikipedia.org/wiki/Color_blindness

    Red–green: 8% males, 0.5% females (Northern European descent) [2] Color blindness or color vision deficiency ( CVD) is the decreased ability to see color or differences in color. [2] The severity of color blindness ranges from mostly unnoticeable to full absence of color perception. Color blindness is usually an inherited problem or variation ...

  3. Color vision - Wikipedia

    en.wikipedia.org/wiki/Color_vision

    Color vision. Colorless, green, and red photographic filters as imaged by camera. Color vision, a feature of visual perception, is an ability to perceive differences between light composed of different frequencies independently of light intensity. Color perception is a part of the larger visual system and is mediated by a complex process ...

  4. Ishihara test - Wikipedia

    en.wikipedia.org/wiki/Ishihara_Test

    Specialty. ophthalmology. ICD-9-CM. 95.06. MeSH. D003119. [ edit on Wikidata] The Ishihara test is a color vision test for detection of red–green color deficiencies. It was named after its designer, Shinobu Ishihara, a professor at the University of Tokyo, who first published his tests in 1917.

  5. Visible spectrum - Wikipedia

    en.wikipedia.org/wiki/Visible_spectrum

    The visible spectrum is the band of the electromagnetic spectrum that is visible to the human eye. Electromagnetic radiation in this range of wavelengths is called visible light (or simply light). The optical spectrum is sometimes considered to be the same as the visible spectrum, but some authors define the term more broadly, to include the ...

  6. Dichromacy - Wikipedia

    en.wikipedia.org/wiki/Dichromacy

    Protanopia is a severe form of red-green color blindness, in which the L-cone is absent. It is sex-linked and affects about 1% of males. Colors of confusion include blue/purple and green/yellow. Deuteranopia is a severe form of red-green color blindness, in which the M-cone is absent. It is sex-linked and affects about 1% of males. Color vision ...

  7. Color theory - Wikipedia

    en.wikipedia.org/wiki/Color_theory

    Color theory, or more specifically traditional color theory, is the historical body of knowledge describing the behavior of colors, namely in color mixing, color contrast effects, color harmony, color schemes and color symbolism. [1] Modern color theory is generally referred to as Color science. While there is no clear distinction in scope ...

  8. Shades of purple - Wikipedia

    en.wikipedia.org/wiki/Shades_of_purple

    The equivalent color on a computer to the pigment color red-violet shown above would be this electric purple, i.e. the much brighter purple you can see reproduced on the screen of a computer. This color is pure purple conceived as computer artists conceive it, as the color on the color wheel halfway between color wheel violet and electric magenta.

  9. List of people with color blindness - Wikipedia

    en.wikipedia.org/wiki/List_of_people_with_color...

    List of people with color blindness. Dr. Roger Couch served as payload specialist on two Space Shuttle missions in 1997. John Dalton, himself colorblind, pioneered research in the field. Australian artist Clifton Pugh won multiple national awards in spite of his protanopia. Mark Twain regularly joked about his colorblindness.

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