Casual Blue Midi Summer Dress with Floral Print Blue Floral Large NWT Self Portrait Blue Lace Panel Midi Dress, Size 8 Devil In A Blue Dress. Raptis Rare Books Fine Rare and Antiquarian First Edition Books for Sale 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