C.I.E. 1976 U.C.S. Chromaticity Diagram

 
Chart is provided for an understanding of color relationships. RGB monitors and printed materials cannot reproduce the full gamut of the color spectrum as perceived in human vision. The color areas shown only depict rough categories and are not precise statements of color.
Standard Illuminants
Source A u' = 0.2560
v' = 0.5243
Source B u' = 0.2137
v' = 0.4852
Source C u' = 0.2009
v' = 0.4610
Source D65 u' = 0.1978
v' = 0.4684
Source E u' = 0.2105
v' = 0.4737