Elegant A Line Open Back Navy Blue Long Prom Dress, Long Dark Blue For abcprom 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 Lady Black Tie Novalee Gown Navy Hot Stone Dress With Lace Up Back Size 10 Navy Blue Maxi Velvet Formal Prom Evening Dress TS2601 Size 4 Navy