Tabelas de cores

http://www.b-log.net/guiablog/cores.htm

http://spaces.msn.com/ajuda-spaces/Blog/cns!1pFPKlNQ3Hp7jnDxW1Ba_8lQ!207.entry

http://spaces.msn.com/danicross7ca/Blog/cns!BCD2CF754B7B3CD4!1156.entry

http://www.ficml.org/jemimap/style/color/wheel.html