The Proper Attire for the Victorian Groom

"He is expected to appear in black trousers, dress coat, which may be either black or blue, white waistcoat, and white cravat."

       "The dress of the bridegroom is regulated by that chosen by the bride; if she wears a white veil, he is expected to appear in black trousers, dress coat, which may be either black or blue, white waistcoat, and white cravat; or, if a naval or military person, in full uniform. If the bride should prefer to wear a bonnet, the bridegroom should put on a frock-coat of black, brown, or other tasteful color, and light-colored waistcoat and trousers."  

Men's Clothing Page