Musical terms used for colors, [6], [46], [148]–[150].

Neutral axis, [31], [34], [61], [65], [121].

Neutral gray, [11], [23], [25], [62], [64], [65], [72], [114], [102].

Notation diagram, [140].

Orange, [9]–[11], [18], [123].

Personal bias, [144], [174].

Pigments, [14], [27]–[29], [101]–[104], [125], [129].

Photometer, [65].

Primary sensations, [89].

Prismatic color sphere, [98].