It's not easy to indicate colors using only black-and-white icons, but four possible solutions present themselves. Books of heraldry used to face the same problem, and they solved it by having standardized patterns of cross-hatching to indicate specific colors. In astrology, each planet had an associated color, some obvious (sun, moon, Mars), but most not. The third way would be to follow the same path that has given us colors like salmon, olive and eggshell. We could simply use the glyphs for common objects of that color. The fourth way would be to use the electromagnetic wavelength (in nanometers) of the color

Heraldry Astrology By Association By Wavelength
Red 680
Purple 410
Blue 475
Green 510
Yellow 570

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Last updated December 2003

Copyright © 2003 Matthew White