Color triangle

A color triangle attributed to Fick in 1892, based on imaginary primaries corresponding to the three primary sensations of the human eye. In such a triangle, all real colors fall within the curved outline defined by the pure spectral colors.

A color triangle is an arrangement of colors within a triangle, based on the additive combination of three primary colors at its corners.

An additive color space defined by three primary colors has a chromaticity gamut that is a color triangle, when the amounts of the primaries are constrained to be nonnegative.

The sRGB color triangle, shown as a subset of x,y space, a chromaticity space based on CIE 1931 colorimetry