Uniform: Dinner dress blue, male Navy chief petty officers PICRYL Public Domain Media Search Engine Public Domain Search A Line V Neck Backless Navy Blue Long Prom Dresses with High Slit, Bac abcprom Shiny Halter V Neck Backless Navy Blue Long Prom Dress, Mermaid Navy B abcprom Uniform: Tropical dinner dress blue, Navy enlisted men, ranks E 1 through E 6. Country: Unknown Stock Photo Alamy 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