Zoanthids can be any color and can even change color depending on the amount and type of light they get. If you want to see a bunch of great looking Zoas go to this link. The best link I know of for identifying your zoanthids and just dreaming about the ones you will want to get someday.
Just click the gallery link on the left side and start dreaming...
CoralPedia.com! :: The definitive repository for named Corals!