There really are no set rules anymore when it comes to dress color choices for winter weddings, but you might want to consider dark-colored dresses like navy, hunter green, and black. These hues look great on almost every bridesmaid and can be worn to formal events later. Rich, saturated colors -- such as deep plum and chocolate -- also work well in the colder months. If you love pastel colors like yellow but are getting married during the winter, consider a deeper hue, like gold. Muted metallic colors are always a great choice for winter bridesmaid dresses; they give your attendants a sophisticated, red-carpet look.