The colors of the regular rhombohedral selection reported by the OSA Committee on Uniform Color Scales are shown in the CIE 1964 U*V*W* color space.
Gunter Wyszecki, "Uniform color scales: CIE 1964 U*V*W* conversion of OSA Committee selection," J. Opt. Soc. Am. 65, 456-460 (1975)