On RuneScape.com there's a list of over four hundred BBCode colors. All displayed in the very color that they are called.
http://services.runescape.com/m=forum/c=FhrB1Yp6zW8/forums.ws?278,279,877,64690220
http://services.runescape.com/m=forum/c=FhrB1Yp6zW8/forums.ws?278,279,877,64690220