Did you know? The Marine Corps' Dress Blues is the only uniform in the U.S. military designated to include the red, white, and blue colors of the American flag. This distinctive uniform Historic uniform change for female Marines; 'there will be no doubts that they are U.S. Marines in the dress blue uniform' > Defense Logistics Agency > News Article View US WWII Era ( 1941 1948) :: Uniforms :: Marine Corps Dress Blue Uniform Ships Detachment Early Discharge Diamond Dress Blues Explained The Dress Blue uniform, worn by Marines, is steeped in history, with roots dating back to 1798 when the secretary of war authorized the wearing of a blue uniform