Other
Watercolor painting.com: Color Theory
A great introduction to color theory with colorful illustrations and examples.
Utah Education Network
Uen: Art Smart
Young scholars will learn about the symbolic meanings associated with various colors. Then students will design a piece of art with colors that are reflective of their personal emotions.
ibiblio
Ibiblio: Web Museum: Henri Matisse
Use this site to learn about Henri Matisse (1869-1954 CE) and his approach to color. (Biography in French.)