Stumped... pls Help!

In need of ideas for the men's outfit's...I have 3 girls...#1 (Matron of honor) is wearing a pink dress with silver #2 girl... she is wearing purple dress with silver accents #3 girl is wearing silver dress. Was thinking about going traditional blk n white suits but 1 of the men is a larger size and I don't want him thinking he looks like a penguin... he already mentioned about not having to wear just a white shirt with blk pants as this was the original plan. So.... I'm not sure how to incorporate or think of a color scheme with my colors (pink, purple/ lavender and silver) to where it looks good.