Scale of, [12], [19], [25], [31], [35], [120], [133].

Ideal color system, [100].

Lambert’s pyramid, note to [31].

Luminist, [121].

Masks, [47], [167]–[171].

Maxwell discs, [93], [107], [113], [117].

Measurement of colors, [3], [8], [14], [116], [Appendix IV].

Middle gray, [61], [65], [72].

Middle hues, [10], [28], [65].

Mixture of hues, [56]–[72].