I think that would be real classy. Also it shows off your individuality! The lavenders aren't as heavy lavender as one might think. They are super shiny / metallic looking and probably have the best looking orient or at least easiest to tell orient of any color. I actually like the lavender earrings better than the white earrings.
In case you are looking for what lavender freshadama earrings look like here are pics of mine. (you gotta scroll down a little to see them):
Did you get your exotics yet?
I know someone else here has posted pics of an entire strand of freshadama lavendar you just have to search for it (I tried to find it for you but for some reason I can't - someone else reading this can probably find it), but it looks great.
Best thing may be to order lavendars and whites at the beginning of your credit card cycle and wear them with your wedding dress and see which one you like better - there is nothing else like seeing them on you with your dress, in person.
Let us know what you decide!