uColor
Opponent Theory
lFour
Primaries: red-green, blue-yellow
lArranged
in opposition pairs
uRed
vs. Green
uBlue
vs. Yellow
uAdd
on to other get neutral color
uNever
see a mixture of opposition pairs.
lEvidence:
ucomplimentary
colors, color aftereffect, simultaneous contrast, color naming - try it with just
red, green blue and yellow
uCells
in visual system respond this way.