Tuxes

Good morning ladies! My girls are wearing Sky blue and I'm not sure what color vest/tie the guys are supposed to wear. I don't want to go blue because I think it's to much. I was thinking of using the extra material from the girls dresses to hankies that they can stick in the pocket on their chest. Anyway, so what color should the vests/ties be? And what should the groom wear to be a little different? And advice is appreciated! TIA!