2 young women surprised with scholarships from Marine Corps Dress blues are the formal uniform worn by U.S. Marines for ceremonial occasions, official functions, and formal events, featuring distinctive dark blue coats, light blue trousers, white belts, and medals or ribbons Male Officer Evening Dress Uniform Package The MARINE Shop Marine This uniform is worn for formal occasions and has largely maintained its current form since the late 19th century. It remains a strong symbol of battles won. Facebook