Contrary to what the name may suggest, black-tie wedding dresses are not limited to black. Pick any color (aside from white, of course), so long as your silhouette is floor-length. This is what distinguishes the dress code from all others, and it can be a fine balance. Be sure your dress lightly sweeps the ground or reveals just a hint of shoe — if it grazes the ankle, it’s probably too short. Opt for elegant fabrications like silks, satins, laces, crêpe de Chines and chiffons.