HTK-AS19 US Army Helicopters Paint Set
Standard colours of US Army helicopters since 1950s
From 1950s till late 1970s, including during the Vietnam conflict, US Army helicopters were painted in Olive Drab overall with various applications of Black and Yellow (also Orange in "high-viz" schemes). The OD paint itself appeared in several shades and faded rapidly.
Helicopter Drab became the "trade mark" of US Army helicopters from early 1980s, with ad hoc application of Desert Sand during first conflict in Iraq.
Recent research over a universal camouflage paint resulted in introduction of Woodland Desert Sage on CH-47s.