Hey everyone :D..help me with beach wedding colors please?

well am going to get married next year my theme is a beach wedding.my center pieces are going to be ivory roses and some candles and the wedding favors some cake or castle candles with a little thank you note my ceremony is going to be a sand one with the vase not handle.but the problem is that what colors should be my bridesmaid dress? how should the groom and groom men be dressed? and the bouquets for the bridesmaids please help.am planning like in june.and the food is going to be a mexican catering any other ideas for food?? please help me out guys :D thanx