Marines adopt new uniform rules for cammies, dress blues USMC MALE OFFICER BLUE DRESS BLUE WHITE DRESS UNIFORM ("A" AND "B") 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 Marines adopt new uniform rules for cammies, dress blues Blue Dress "D" USMC Uniform Guide