DVIDS News Operation: Dress Blues helps Marines find uniforms USMC MALE ENLISTED BLUE DRESS BLUE WHITE DRESS UNIFORM ("A" AND "B") 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 Private First Class Jamarion Simmons a Houston, TX native, stands at attention prior to graduating from Marine Corps Recruit Depot San Diego. Marine Dress Blues represent tradition, honor, and pride every stripe, medal, and detail reflects the legacy and discipline of those who've earned the title Marine.