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Plot of selected cube root cone sums around a Munsell Hue circle. (A) For value = 6 and chroma = 6 chips, the cube root of the L cone (red), M cone (green), and S cone (blue) on the Munsell Hue circle beginning at 2.5 Red. (B) The basis factors obtained by a singular value decomposition of the three curves in A. The x axis labels are as in Fig. 4.
