Color Vision III: Color Appearance
	u Color Opponent Theory l Four Primaries: red-green, blue-yellow l Arranged in opposition pairs u Red vs. Green u Blue vs. Yellow u Add on to other get neutral color u Never see a mixture of opposition pairs. l Evidence: u complimentary colors, color aftereffect, simultaneous contrast, color naming - try it with just red, green blue and yellow u Cells in visual system respond this way.