Abstract

By a simple adaptation of disk colorimetry the hues of negative after-images of colored surfaces are ascertained to within the equivalent of 1.0 step of Munsell hue. There is good agreement among a number of observers. The complementary pairs thus obtained show differences from those established additively, particularly in the orange-blue region. The relationship between the two sets of complementaries appears to be connected with the change of hue which occurs when colors are desaturated by additive mixture. This change of hue also accounts for the nonuniform spacing of hues which is a necessary feature of color circles based on additive complementary pairs.

From the observed changes of hue over a range of colors, lines of constant hue are plotted.

© 1955 Optical Society of America

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