This is it! But with your dresses!! Can't you just see it!? And the flowers would work perfectly with the dresses that you already picked. I think you should run with the purple and green... cream washing everything out though to keep it from being overwhelming... what do you think?!
This is a deeper purple, like the paint samples we were looking at... It would go great with a bright and brilliant green (: Maybe the sashes on the dresses could be closer to this color?