Note 1 to entry: In the case of purple stimuli, the monochromatic stimulus is replaced by a stimulus whose chromaticity is represented by a point on the purple boundary.
Note 2 to entry: In the CIE 1931 standard colorimetric system, colorimetric purity,
Note 3 to entry: In the CIE 1964 standard colorimetric system, a measure,
Note 4 to entry: This entry was numbered 845-03-47 in IEC 60050-845:1987.
Note 5 to entry: This entry was numbered 17-195 in CIE S 017:2011.