Scheme:   monochromatic contrast (base + complement) soft contrast (split complements) double-contrast (2 neighbors + complements) analogic (base + neighbors)

Distance [0 to 60�]:   �   0� - contrast, 60� - triade  Use it

Distance [-90 to 90�]:   �   (90� - tetrade)  Use it

Distance [0 to 60�]   �   add the complement  Use it