About the AuthorProfessor: CambridgePresident: International Color Vision Society (ICVS)Research interests • visual perception of colour, motion, form and depth • genetic basis for individual variations in perception• nature of the information carried by the cerebral bus • history of neuroscience and of colour theory
Additive & Subtractive Color Mixture
Additive – the wavelengths add to each other!
More light reflected!
Subtractive mixture – paints, ink or color filter
More light absorbed, so less reflected!
Color Matching
Red (700 nm)
Green (546 nm)
Blue (436 nm)
rR + gG + bB mM
Trichromacy: Given three different colored lights of variable intensities, it is possible to mix them so as to match any other test light of any color.
Test fieldMatching field
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