Robin,
If you look good in white gold, you should look good in the silver/platinum color Tahitians. Personally, they are my favorite.
Use the search feature at the left to look for silver tahitians. If you call the pearl companies that come up, they can personally select silver tahitians from their stock, if that is what you fancy.
Or go shopping and see what's out in jewelry stores. You can find out for sure what color you like best. You may find that black Tahitian pearls with colored overtones don't look black at all
You may end up with each color anyway! Especially if you keep hanging around here...
Cheers,
Blaire