blue green dresses prom Dark Long A-Line Dress Purple / 6 Metallic Fabric Color Mint Green Unique A-Line Simple

Assuming reasonably well off bride and groom, and an outdoor or partially outdoor venue that is a little more rustic than a fancy resort, I'd go with: Dressier sweater dress (maybe this: Boots (lots of options, I like these: Layered necklace ( OR statement earrings ( Seasonal outer layer ( I threw the options together fast so these may not go together perfectly, but you get the vibe

shown color dusty rose bra support with cups boning yes closure back zipper lining top without lining

Once you understand which colors complement burgundy's warm undertones, you'll feel confident mixing and matching for any occasion

You could make it wider by adding more of shirred portion in the back