USMC Sergeant Major Chevrons
The Marine Corps currently uses four types of rank insignia (chevrons): gold on red for the dress blue uniform (blues), green on red for the service uniform (greens), green on khaki for the service shirt and black metal on utilities (Women Marines wore green on white chevrons between 1952 and 1979 on the old green and white summer service uniform). Enlisted rank insignia are worn on both sleeves of dress and service coats, jackets, and shirts as well as both collars of field and utility coats.