Royal Blue Long Sleeve Backless Cocktail Dress Lulus Royal Blue Velvet Backless Long Sleeve Midi Dress Navy Blue Evening Dresses Bloomingdale's According to the 1975 U.S. Navy Uniform Regulations, the rarely seen Service Dress Blue (Yankee) uniform was for "warm weather afternoon and early evening functions such as yachting parties." The uniform was Shop Online Royal Blue Evening Gowns With Sleeves Sequin Embellished Bodice Alibaba.com Framed U.S. Navy Evening and Dinner Dress Blue Uniforms 1967 by Hugh Charles McBarron Pejock Women Evening Party Wedding Guest Dresses Casual V Neck Solid Backless Wrinkle Sleeveless Dress Skirt Navy L (US Size:8), Women's, Size: Large