This is a modified color wheel that I learned from one of my professors in design school. It's main purpose to help one choose more interesting/less expected tertiary colors than a plain ol' split compliment. I have some trouble with color, so I use this color wheel almost everyday. Below is a diagram showing how to use it:
I start with a blue and it's compliment, orange. The expected split compliment that would go along with this combo is a yellow-green, but here I move to the color "opposite" of yellow-green and end up with red-violet. I find this color combo unusual and pleasing. TAKE THAT, ART HISTORY!
ALSO! You can buy rad stuff with the color wheel all over it in my Society6 Shop!
AND ANOTHER ALSO! I'm providing you radical homies with a whole load of desktop/device wallpapers. Take as many as you want!