Museum Network (UK)
Wallace Collection: Material World: Paint
Learn about the material composition of paints used by artists and where pigments that give paint its color come from. Emphasis is on natural pigments obtained from plants, animals, and minerals, rather than on paints created for...
Other
Watercolor painting.com: Pigments and Paint
This resource provides an extremely detailed account of watercolor pigments and paints. It includes a long list of colors and how they are made.