Hunt, R. W. G. Measuring Colour. Chichester, England: Ellis Horwood Ltd., 1987.
Itten, Johannes. The Art of Color. New York, NY: Van Nostrand Reinhold Co., 1961. pp. 16–17.
Livingstone, Margaret. Vision and Art: The Biology of Seeing. New York, NY: Harry N. Abrams, 2002.
Sacks, Oliver. “The Case of the Colorblind Painter.” An Anthropologist on Mars: Seven Paradoxical Tales. New York, NY: Vintage, 1996.
Wyszecki, Gunther, and W.S.Stiles. Color Science: Concepts and Methods, Quantitative Data and Formulae. 2nd ed. New York, NY: John Wiley and Sons, 1982. (Very thorough and dense, with lots of math. Only for the committed or the fearless.)