Khaki, as described in Soldier and Sailor Words and Phrases, was “the name of a colour-dust colour. First introduced as uniform in 1848...and adopted during the Indian Mutiny by some of the British regiments. The Oxford and Bucks Light Infantry (the 1st Battalion - old 43rd Foot) are said to have been temporarily put into "Khaki" before the Mutiny: when stationed at Peshawar and under orders to go on a punitive expedition against Kyhber tribesmen. It was the hot weather and to exchange the white drill uniforms for the regulation thick red tunic was considered out of the question. At the same time, to send men in white against the Afghan marksmen, meant offering target which could not be missed. To solve the difficulty the Colonel adopted the "Guides" colour and had the uniforms stained with brown mud. Khaki became the Field-Service uniform of the Indian Army between 1860 and 1870. Its official adoption as the British Army War Uniform dates from the South African War (Boer War) of 1899-1902.” 
The word is derived from the Persian "Kâk" which means dust.
- Edward Fraser and John Gibbons (1925). Soldier and Sailor Words and Phrases. Routledge, London p.134.
Glossary of words and phrases[edit source]
The above term is listed in our glossary of words and phrases of the Armed Forces of Great Britain during the Great War. Included are trench slang, service terms, expressions in everyday use, nicknames, the titles and origins of British and Commonwealth Regiments, and warfare in general. These words and phrases are contemporary to the war, which is reflected in the language used. They have been transcribed from three primary sources (see Contents). Feel free to expand upon and improve this content.
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