Carbon is a proper tuxedo for the groom, if the sponsor and the groomsmen are in black tux?
Groomsman be on the morning of coal suit / court, the best man in black tuxedo regular, and the rest of the regular black men in tuxedos. Is "coal" dark enough, or is it light enough that the groom look bad?
Forget for a minute in color. What we have here is an absurd jumble of formal wear. Despite the bad habit calling all the rental shops formal wear a "smoking", there are different categories. While cutaway are suitable for daytime wear, suits label are evening gowns. The two things should not be combined. If this is a wedding day, all men must be held tomorrow. If the night, they must all be in black tuxedos. As long as men have the same type of formal wear, the data need not match exactly.
