There are many different types of cocktail dress. Cocktail dresses are usually short, but they can be full-length, with sleeves or without. While many think of the color black, cocktail dresses can really be any solid color or print, as long as it is keeping with the season and event. While modern women are encouraged to break fashion tradition, such as wearing white even after Labor Day, it should still be appropriate for the event. For example, you should never wear a white dress to a wedding, especially a full-length gown.