Royal Blue Long Sleeve Backless Cocktail Dress Lulus Royal Blue Velvet Backless Long Sleeve Midi Dress 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 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 Sexy Flowers Royal Blue Prom Dress Long Sleeve Prom Dress