Green beret
The 10th Special Forces Group (Airborne) had many OSS World War II veterans in their ranks when it was formed in 1952. They began to unofficially wear a berets of varying colour while training. The color green became favored because it was reminiscent of the World War II British Commando-type beret. The 10th Special Forces Group (Airborne) deployed to Bad Tolz, Germany in September 1953. The remaining cadre at Fort Bragg formed the 77th Special Forces Group. Members of the 77th SFG began searching through their collections of berets and settled on the Rifle Green colour of the British Rifle Regiments (as opposed to the Lovat Green of the Commandos) from Captain Mike de la Pena's collection. Captain Frank Dallas had the new beret designed and produced in small numbers for the members of the Special Forces.
Black beret
The black beret is a type of headgear. It is commonly worn by paramilitaries and militaries around the world, particularly armored forces such as the British Army's Royal Tank Regiment (RTR), the Royal Canadian Armoured Corps (RCAC), and the Royal Australian Armoured Corps (RAAC). Notable non-armored military units to wear the black beret include the Russian Naval Infantry (and formerly Soviet) and Russian OMON units, the United States Air Force (USAF) Tactical Air Control Party (TACP), Philippine National Police-Special Action Force (PNP-SAF) members, and the Royal Canadian Navy ("navy blue"). It was also worn by the United Kingdom's Royal Observer Corps (ROC) with their Royal Air Force (RAF) uniform, Metropolitan Manila Development Authority (MMDA).
Black berets are also worn by navies. In some navies, the naval color called black is officially "very dark blue". The Dutch Navy and Marines wear dark navy blue berets; a silver anchor for the Navy and a gold or dark brown (field duty) anchor on a red background for the Marines. The Portuguese Marines and San Marco Regiment, the Marines of the Italian Navy also wear a dark blue beret. The Royal Norwegian Air Force also use a dark blue beret. Finnish Marine Infantry wear a dark blue beret with the Navy insignia.(Finnish Coastal Jaegers - marine commandos - part of the same Nylands Brigade, wear the green beret).