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. 2017 Sep 29;8(5):2041669517733484. doi: 10.1177/2041669517733484

Figure 4.

Figure 4.

At left, the color matching functions for the parts of daylight RGB colors. At right two (mutually symmetric) halves of the surface of the Schrödinger color solid. The skeleton cube is the parallelepided spanned by the red, green, and blue parts of daylight. This is a straight calculation from the CIE tables. The RGB cube snugly fits the color solid, in practice the overwhelming majority of object colors lies in the cube. This is the theoretically optimal representation of RGB colors.