873804.fig.003
Figure 3: 1931 2° CIE Chromaticity Diagram containing the A and D65 sources and topaz color line path depending on thickness. The regions represent the following colors: (1) purplish blue, (2) blue, (3) greenish blue, (4) blue-green, (5) bluish-green, (6) green, (7) yellowish-green, (8) yellow-green, (9) greenish-yellow, (10) yellow, (11) orange-yellow, (12) orange, (13) reddish-orange, (14) yellowish-pink, (15) red, (16) purplish-red, (17) pink, (18) reddish-purple, (19) purplish-pink, (20) reddish-purple, (21) purple, and (22) violet.