Purple Cocktail Evening Dresses at Dorothy Boots blog Purple Cocktail Party Dresses Plum Purple Evening Dresses & Gowns Purple Cocktail Dresses JJ's House Purple Cocktail Dress With Sleeves. How adorable is this neon purple cocktail dress? It is a nice flowy dress that has a horsehair hemline to make it flow nicely. It also has an open back with a lace up detail across the top of the back to adjust it the way you want it to. This dress also has a nice waistline that is very flattering. This dress also has pockets in it! Size 4