Also on these boards
Groomsmen = white dress shirt (tailored) + graphic tie (maybe something red to tie in their color) + black pants + grey vest & white belt... I'd have the groom with a nice belt buckle so he stands out.
Groomsmen: cornflower blue vests and ties to match bridesmaid dresses with yellow freesia boutonnieres. Groom: Black vest and tie with white boutonniere
not the tie, but the flower..