Dyes And Pigments New Research - The Color of Art Web Site is a artists reference on color, especially pigments and paint. Useful for all artists painting or working in any media or mediums. The most useful area of the site is the free Pigment Database with info on practically every pigment used in the art studio and sorted by color index names. There is also the popular free art book section.. Color additives are subject to a strict system of approval under U.S. law [Federal Food, Drug, and Cosmetic Act (FD&C Act), sec. 721; 21 U.S.C. 379e]. Except in the case of coal-tar hair dyes.