Purple, [5].

Rainbow, [15], [17].

Red, middle, [1], [32], [41], [60], [66], [72], [104], [110], [122], [147], [148].

Retina, [21].

Rood, modern chromatics, [Appendix I].

Runge, note to [31], [Appendix V].

Shades and tints, [22].

Spectrum, solar, [15]–[18], [27], [28], [87], [88], [92], [95], [96].

Tone, [6].

Value, [3], [8]–[11], [14], [21]–[24], [28], [34], [39], [40]–[43], [54], [76], [78], [82], [94], [105], [120], [132].