navy blue evening dress: Dresses For Women Dillard's Navy Blue Maxi Velvet Formal Prom Evening Dress TS2601 Size 4 Navy US NAVY Male Officer Dinner Dress Blue Jacket Used 40 Regular (34 Sleeve) Black (USNA Flying Cross) Shiny A Line V Neck Navy Blue Backless Prom Dresses, Open Back Navy Bl jbydress Navy Blue Off the Shoulder Prom Dress,Evening Dress,Tulle Prom Dress US16W As Picture 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