With the establishment of the Royal Air Force as an independent service on 1 April 1918, orders were issued detailing new uniform patterns. Major General Mark Kerr designed the first officer uniform which was largely pale blue with gold braid trimmings. Additionally, the Royal Flying Corps' use of khaki was continued. It has been suggested that the pale blue colour was adopted as the cloth had been intended for use by the Imperial Russian Cavalry and, following their disbandment after the Bolshevik Revolution it became available at low cost. As it was the responsibility of officers to buy their own uniforms, a wearing-out period for old uniforms was allowed and the change-over to the air force uniform was slow.