The change from "Pike-Grey" to "Field-Green" was implemented in 1915. Late war has quite a bit of scope for variation in uniform colours. The slow internal collapse of the empire and the chronic shortages meant that standardisation went by the wayside to a degree, as they had to make do with what they could get. The necessity of using lower quality materials led to uniforms fading to a kind of brown very quickly in 1917-18, and stocks of much greener captured Italian jackets were also worn by some troops.