trichromatic

1. Of, relating to, or having three colors, as in photography or printing.
2. Having perception of the three primary colors, as in normal vision: trichromatic vision; a trichromatic individual.

The principle of human color perception. The retina in the human eye contains cone cells with three different kinds of proteins, and each protein absorbs a different color. One is more sensitive to blue, and the other two are more sensitive to yellow. The difference between the two types of yellow cones determines a range of green to red. Hence, red, green and blue (RGB). See tristimulus, RGB and YUV.

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1. Having or relating to the three primary colors, red, blue, and green.
2. Having perception of the three primary colors, as in normal vision.

The adjective has one meaning:

Meaning #1: having or involving three colors
  Synonyms: trichrome, tricolor