Royal Blue Velvet One Shoulder Long Formal Dress with Attached Train Royal Blue 00 Velvet 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 Long Sleeves Glitter Royal Blue Wedding Guest Dress with Split Framed U.S. Navy Evening and Dinner Dress Blue Uniforms 1967 by Hugh Charles McBarron Elegant Sydney Navy Maxi Dress Perfect for Formal Events & Weddings Large Full Long Sleeve Royal Blue Prom Dresses Long & Short Prom Gowns Stacees