Bridesmaid would be beautiful scenery on a wedding party; so much attention should be paid on the choosing as well. For dresses for bridesmaid, color would be important to be pretty but not cover the beauty of bridal dress.
For color, bridesmaid dress should be lighter than the wedding dress, and warm color system is preferred. Since wedding dress color is always being white, so on that day, the same color should be avoided.
Red would be a good choice due to its passion and festival. And red decoration would be good, such as red sash, red skirt or so.