Royal Blue Sweetheart Prom Dress Dresses New Holiday Velvet Royal Blue Belle Wrap Glitter Dress Beaded Sweetheart Light Blue Ruffles Long Dress Dressesforparty The Blue Sweetheart Neck Shirred Midi Dress & Reviews Blue Dresses. This full length dress in royal blue satin features a fitted silhouette with a strapless sweetheart neckline. It is detailed with a frilled slit and secured with a zip closure at the back for a polished finish. SKU: NPB2700 Satin material Royal blue color Fitted silhouette Sweetheart neck Strapless neck Slit with frill Zip up back Full length