2D Chromaticity Diagram 

Chromaticity diagrams are often used to visualize and understand color relationships. ChromaticityPlot can be used to display colors, images, and color spaces in the CIE 1931 and CIE 1976 UCS chromaticity diagrams.

Visualize and compare the extent of multiple color spaces.

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X ChromaticityPlot[{"sRGB", "WideGamutRGB"}]

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Plot color distributions from different color spaces.

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X n = 2000; ChromaticityPlot[#, "CIE76", Appearance -> None] & /@ { RandomColor[RGBColor[_, _, _], n], RandomColor[ LCHColor[.6, UniformDistribution[{.6, 1.2}], NormalDistribution[0, .15]], n]}

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Visualize the chromaticity of the daylight illuminants.

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X ChromaticityPlot["RGB", WhitePoint -> {"D50", "D55", "D65", "D75"}, ImageSize -> 300, BoundaryStyle -> Black, PlotRange -> {{.15, .65}, {0.05, .6}}]

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