The pale blue colour for officers' uniforms was unpopular and impractical and John Slessor who was later promoted to Marshal of the RAF described it as "a nasty pale blue with a lot of gold over it, which brought irresistibly to mind a vision of the gentlemen who stands outside the cinema". A little over a year after its introduction, the pale blue colour was discontinued. On 15 September 1919, Air Ministry Order 1049 replaced it with the blue-grey colour which has remained in use to this day. The olive green uniform continued to be worn until 1924 when it too was replaced by a blue-grey colour.