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  2. Trichromacy - Wikipedia

    en.wikipedia.org/wiki/Trichromacy

    Trichromatic color vision is the ability of humans and some other animals to see different colors, mediated by interactions among three types of color-sensing cone cells. The trichromatic color theory began in the 18th century, when Thomas Young proposed that color vision was a result of three different photoreceptor cells.

  3. Young–Helmholtz theory - Wikipedia

    en.wikipedia.org/wiki/Young–Helmholtz_theory

    Thomas Young and Hermann von Helmholtz assumed that the eye's retina consists of three different kinds of light receptors for red, green and blue.. The Young–Helmholtz theory (based on the work of Thomas Young and Hermann von Helmholtz in the 19th century), also known as the trichromatic theory, is a theory of trichromatic color vision – the manner in which the visual system gives rise to ...

  4. Color vision - Wikipedia

    en.wikipedia.org/wiki/Color_vision

    Two complementary theories of color vision are the trichromatic theory and the opponent process theory. The trichromatic theory, or Young–Helmholtz theory , proposed in the 19th century by Thomas Young and Hermann von Helmholtz , posits three types of cones preferentially sensitive to blue, green, and red, respectively.

  5. Evolution of color vision in primates - Wikipedia

    en.wikipedia.org/wiki/Evolution_of_color_vision...

    This theory supports the evidence showing that trichromatic color vision originated in Africa, as figs and palms are scarce in this environment thus increasing the need for this color vision selection. However, this theory does not explain the selection for trichromacy polymorphisms seen in dichromatic species that are not from Africa. [22]

  6. Evolution of color vision - Wikipedia

    en.wikipedia.org/wiki/Evolution_of_color_vision

    Researchers studying the opsin genes responsible for color-vision pigments have long known that four photopigment opsins exist in birds, reptiles and teleost fish. [3] This indicates that the common ancestor of amphibians and amniotes (≈350 million years ago) had tetrachromatic vision — the ability to see four dimensions of color.

  7. Opponent process - Wikipedia

    en.wikipedia.org/wiki/Opponent_process

    The observer then perceives a cyan (or magenta) square on the blank sheet. This complementary color afterimage is more easily explained by the trichromatic color theory (Young–Helmholtz theory) than the traditional RYB color theory; in the opponent-process theory, fatigue of pathways promoting red produces the illusion of a cyan square. [39]

  8. The Best Color Theory Books for Foundational Knowledge

    www.aol.com/lifestyle/best-color-theory-books...

    The foundation of color theory is the color […] As much a science as it is an art, color theory is a complex study that outlines prismatic relationships and how the human eye perceives the spectrum.

  9. Color model - Wikipedia

    en.wikipedia.org/wiki/Color_model

    Human trichromatic color vision is a recent evolutionary novelty that first evolved in the common ancestor of the Old World Primates. Our trichromatic color vision evolved by duplication of the long wavelength sensitive opsin, found on the X chromosome. One of these copies evolved to be sensitive to green light and constitutes our mid ...