Hello my fellow September 2013 brides

I'm having second thoughts about my wedding colors. I know for a fact that I want to go with plum, which will also be the color of the bridesmaids dresses but am unsure what other color I would like. I was leaning towards black, purple and white but I am just not sure. The wedding is going to be rather fancy and elegant so I thought the black would look stunning but I'm just not sure how I am going to incorporate it into the ceremony/reception. Please help!