The Harmonic Color-Tone Wheel

Color-Tone2
When color symmetry is mapped onto the scale symmetry of a 7-tone diatonic scale, a perceptual correspondence can be established between vision and audition. Within this color-tone system, the well-known Tritone Function of musical harmony can be equally applied to the color wheel. That is, the Fall tritone colors Red and Green resolve to their sky blue tonic color of Cyan.