Abstract

Magnitude estimations of saturation were obtained for each of 15 pigmented surfaces of different hue, viewed under artificial light in a 4° test field. Saturation was found to be related to colorimetric purity by a power function whose exponent varied with the dominant wavelength. The highest exponents were in the yellow-orange region and the lowest in the blues. Five of the color samples were viewed under both daylight and artificial light with test fields of 4° and 0.7°. The larger visual field and daylight gave somewhat lower exponents for all dominant wavelengths except those in the yellow region. The exponents for saturation of surface colors are systematically higher than those reported for aperture colors.

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