Grey for out groomsmen grey and cream groomsmen. Maybe add a mint green colored flower?
Groomsmen in dark grey suits, navy ties and brown shoes
The groom looks distinct from his groomsmen. Here, the groom wears a suit jacket and traditional tie, while the guys don vests and bowties. I also like the idea of the grooms outfit being lighter or darker than his buddies
I would like that but inversed. The groom have a darker tux.