Color Vision I: Color Matching - 2
u Color Matching in the Trichromatic Theory
l Two patches of light will appear the same if the
activity across the three cones is the same,
regardless of wavelengths making up the two
patches.
l In general, can match any one color  with three
other colors
u This is where we get three primaries.
l Neutral colors - whites and grays
u a balance of activity across the three receptors.