Formal attire A formal wedding dress code is slightly less formal than a black-tie event, and in general, it tends to have fewer specifications. Women can get away with a nicer cocktail dress, and for men, tuxedos are not required. Jacket and tie or suit with tie encouraged. Formal wedding attire sits between cocktail and black tie on the wedding dress code scale. It's slightly more elevated than cocktail attire and a touch less dressy than a black-tie nuptial. For summer events, lighter fabrics, brighter colors and shorter hems can be common for formal attire. Overall, pick an outfit that you truly love and feel your best in, while still being respectful of the couple's attire request. As for colors to avoid for formal weddings, steer clear of white, ivory, cream, or champagne-colored dresses and light-colored suits.