Provide an overview of the trichromatic and opponent-process theories of color vision, and resolve the "debate" between the two

What will be an ideal response?

The trichromatic theory proposes that the eye has three types of receptors, each responsive to one of the three primary colors of light: red, blue, and green. The eye then additively mixes different proportions of these three colors to produce the colors we see. The opponent-process theory proposes that color perception depends on receptors that make antagonistic responses to three pairs of colors. The three pairs of opponent colors are red-green, blue-yellow, and black-white.

Both theories are needed to adequately explain color vision. In the earliest stage of information processing, there are three types of cones, each responsive to a different band of wavelengths, consistent with trichromatic theory. In later stages, cells in the retina, the thalamus, and the visual cortex respond in opposite ways to complementary colors. Thus, color coding begins with a trichromatic process and then switches to an opponent process.