I would maybe try to do something with lilacs. Just make sure you don't have anyone allergic around them ^_^ Maybe you could do lilac scented votives on the tables as an idea. My fiance and I were thinking of doing colored M&M's for our favors (we still haven't decided yet). You could try that with the lavender and baby blue. I know they make them in a million different colors now. Hope that helps a bit or at least inspires.