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 U.S. Navy Blue Dinner Dress Jacket Works Intrepid Museum Uniform: Dinner dress blue jacket, male Navy officers NARA & DVIDS Public Domain Archive Public Domain Search Dress right, dress! NSA Mid South Sailors participated in a dress blue inspection this morning. Looking sharp, team!