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Colour constrast and assimilation		Hering colour opponency		Watercolour illusion		Boynton Illusion
Colour mixing		CIE x,y chromaticity diagram		2-stage post-receptoral model		3-stage post-receptoral model
Light levels		Rod pathways		Phototransduction cascade		Pugh & Mollon model
McCollough effect		DKL space		RGB space		LMS space