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 Uniform: Dinner dress blue, Navy enlisted men, ranks E 1 through E 6 NARA & DVIDS Public Domain Archive Public Domain Search File:U.S. Navy FMF corpsman in dinner dress blue jacket uniform, 2016.jpg Wikimedia Commons Navy Blue One Shoulder Prom Dresses With Slit, MP941 Musebridals Framed U.S. Navy Evening and Dinner Dress Blue Uniforms 1967 by Hugh Charles McBarron Modest Navy Blue Evening Dress 25888L Neva style.com