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 File:US Navy Dinner Dress Blue.jpg Wikimedia Commons Wedtrend Women Dark Navy Prom Dress Mermaid Spaghetti Straps Sparkly Sequined Evening Dress With Slit WEDTREND Elegant A Line Open Back Navy Blue Long Prom Dress, Long Dark Blue For abcprom