Flower ideas for bridesmaids and groomsmen....?

Our wedding colors are black and silver. The bridesmaid dresses are black. I will be carrying calla lilies and my fiancee's boutineere (sp??) will also be from calla lilies. The groomsmen will most likely be wearing black tuxedos with white shirts and silver vest/tie. Since I obviously can't have black or silver flowers for the attendents, I was thinking that red would be a good way to give the wedding a little more color. Any ideas for types of flowers? I want a deep, crimson-like red.