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 One Shoulder Royal Blue Long Prom Dress Simple Evening Dress PG846 Custom Size Royal Blue Royal Blue Mermaid Prom Dresses,Sequined Lace Evening Dress,PD00403, US24W Black Navy Blue One Shoulder Prom Dresses With Slit, MP941 Musebridals