There's plenty. A member here even started a tanned/darker skinned character listing.
Try using the search function, too, since she might not have all suggestions up there. To search, when you enter a forum, look up at the right in the dark purple bar. Should see "search this forum" or, if you're in a thread, like this one, "search this thread". Enter your terms in there (perhaps "tanned", "dark skin", etc) and see what comes up. Words must be more than 3 letters long.