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 Sexy Blue Evening Dress, Mermaid Formal Gown, Bridesmaid Dress, Long Sleeves, Prom Dress, Couture Dress With Lace by Tonena Etsy A Line V Neck Light Blue Long Prom Dresses, Light Blue Long Formal Evening Bridesmaid Dresses, US 10 Custom Color No Rush Mess dress uniform Wikipedia Royal Blue Mermaid Satin Long Prom Dress, Off Shoulder Blue Evening Dress US 10 Black