the top wheel isn't correct, but the bottom wheels are cool
Color meaning of emotions.
A better explanation than I've ever gotten from a teacher or book. This could be the wiki for color theory: Why do some color schemes work, and others don’t?
Creative Color Wheel: L. P. Updated color wheels | The Bees Knees Cousin
The first full color wheel, 1766. From "100 Diagrams That Changed the World".
Elements of design - colour
The Painter's Compass
Kids Art Market: Color Wheel Perspective
Mr. O's Art Room: 1st Grade Color Wheel Umbrellas