chromaticity diagram

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Related to colour triangle: Maxwell triangle

chromaticity diagram 

Plane diagram showing the results of mixtures of colour stimuli, each chromaticity being represented by a single point on the diagram (Fig. C10). Syn. colour triangle. See MacAdam ellipses; CIE standard illuminants; white light; purple; spectrum locus.
Fig. C10 The CIE chromaticity diagram (1931) (W, white light illuminant C; C and D, complementary wavelengths)enlarge picture
Fig. C10 The CIE chromaticity diagram (1931) (W, white light illuminant C; C and D, complementary wavelengths)