Trichromacy

<p>Trichromacy or trichromatism is the possession of three independent channels for conveying <a href="/facts/Color/a1QSEJhj">color</a> information, derived from the three different types of <a href="/facts/Cone_cell/JoQeEzoF">cone cells</a> in the <a href="/facts/Eye/h3lbYU55">eye</a>. Organisms with trichromacy are called trichromats.
</p><p>The normal explanation of trichromacy is that the organism's <a href="/facts/Retina/v0ISNX2S">retina</a> contains three types of color receptors (called <a href="/facts/Cone_cell/JoQeEzoF">cone cells</a> in <a href="/facts/Vertebrate/tT54FSTT">vertebrates</a>) with different <a href="/facts/Absorption_spectroscopy/GH7RC14D">absorption spectra</a>. In actuality, the number of such receptor types may be greater than three, since different types may be active at different light intensities. In vertebrates with three types of cone cells, at low light intensities the <a href="/facts/Rod_cell/mNd9Sf1E">rod cells</a> may contribute to <a href="/facts/Color_vision/j3ou3Izz">color vision</a>.
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Trichromacy open-in-new

Trichromacy