Gold wedding gown. What color bridesmaid dresses?
Okay – here is my favorite trick. Use your local paint store. Start with a paint chip that is closest to your dress, then go from them. Match and play with colors that seem to coordinate with that. Some stores even have charts with complimentary colors. You can have something that is striking against it (blues, etc), or something that is in the same tone, just a different color (like browns, etc.). You won’t know until you see how it all plays out.