After unification, all personnel in the Canadian Forces wore a rifle green uniform with only cap and collar badges (a modified version of the former RCAF badge) as distinguishing marks for pilots and aircrew. Use of this uniform continued under Air Command from 1975 until the mid-1980s, when Air Command adopted a blue "distinctive environmental uniform". This uniform continued to be used until 2015 when the rank structure and insignia changed. Insignia changed from golden yellow to a pearl-grey colour similar to that worn before unification of Canada's Armed Forces in 1968 and the button color was changed. Other changes reflect the replacement of the rank of "private" with that of "aviator", and officers' tunic sleeve insignia were modified.