I agree, I don't think the bridesmaid dress and the vests need to be the same color. I think they should be colors that look good together though. Our colors are pink, black, and white. My FH is wearing a white tux and his groomsmen will be in black tuxes. I am thinking I will have them wear a pink tie with either black or white vests. I am not lucky enough to have groomsmen who are all about wearing pink. And their boutaniers will be pink and white also.