Brown And Or Verses Black

Like Brandi, I would really like to use chocolate or mocha bridesmaid dresses. My sisters do not look good in a hazelnut, or light colored dresses, so they need to be darker. The church we`re getting married in is a rich, deep red (carpet, pews) and a white interior with beautiful stained glass windows (very classy and elegant). I don`t want my bridesmaid dresses to clash with the colors in it and that`s why I`m thinking about chocolate with cream, ivory, and white accents. My only question is how will this all look with black tuxes that the guys will be wearing?