[4.3.3.1] H
The index of the hue of the perceived object color defined in terms of the luminance factor (Y) and chromaticity coordinates (x,y) for CIE Standard Illuminant C and the CIE 1931 Standard Observer.*
* Newhall SM, Nickerson D, Judd DB. Final Report of the O.S.A. Subcommittee on the Spacing of the Munsell Colors. Journal of the Optical Society of America. Jul 1943;33:385.
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