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 Wedtrend Women Royal Blue Prom Dress Mermaid Spaghetti Straps Satin Formal Evening Dress with Split Front, Royal Blue US6 Dark Blue Evening Dress from Satin XXXL Dark Blue Stretchy Blue Dinner Jacket Tux by Egara Tuxedo Rental