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Loci of constant hue and saturation have been determined with an artificial-daylight surround and with a surround closely matching the chromaticity of a blackbody at 3200K. The results are compared with results published by Bouma and Kruithof and by Richter. Attention is drawn to doubtful assumptions on which their results are based.
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David L. MacAdam (1951) studied this question.
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