Green beret
U.S. Special Forces wear the green beret as a distinction of excellence and uniqueness within the Army.
Maroon beret
The Special Service Group (SSG) wears a maroon beret with a silver SSG badge on a sky blue flash.
Line infantry regiments which were parachute trained wore their own regiments' berets till airborne role was taken away from infantry and assigned to SSG which became the army's only airborne outfit from 1964 onwards.
In addition to SSG, Army Aviation and Air Defence, Army medical corps wear maroon berets