Youth Marine Dress Blues Uniform Framed Print of World War II Marine Corps Captain in Dress Blue Uniform Print. Framed Print from Heritage Images The term "dress blues" refers to a military uniform worn for formal occasions. The dress blues uniform is worn by various branches of the military, including the Army, Marine Corps, Navy, and DVIDS News Operation: Dress Blues helps Marines find uniforms USMC MALE ENLISTED BLUE DRESS BLUE WHITE DRESS UNIFORM ("A" AND "B")