Shiny A Line V Neck Navy Blue Backless Prom Dresses, Open Back Navy Bl jbydress Elegant A line Straps Tulle Navy Blue Prom Dresses Formal Evening Dres PreppyDress Long navy blue evening dress with separate sleeves U.S. NAVY FEMALE OFFICER ENLISTED DINNER DRESS BLUE JACKET A Line One Shoulder Satin Beads Dark Blue Long Prom Dress, Blue Long Evening Dress US 4 Custom Color Service Dress Blue (Yankee) uniform was for "warm weather afternoon and early evening functions such as yachting parties." The uniform was formally phased out in 2011 : r navy