Conversation so far:
why did the british army wear red tunics
The British were not alone in dressing their military officers in red uniforms. Its rarity and its link to status made good red dye almost priceless.
In what time period did the British military wear the red tunics
From the mid-17th century to the 19th century, the uniform of most British soldiers (apart from artillery, rifles, and light cavalry, included a madder red coat or coatee.
Is the red color still used by the British army in their uniforms
British soldiers fought in scarlet tunics for the last time at the Battle of Gennis in 1885. Scarlet tunics ceased to be general issue upon British mobilisation in August 1914
What was the new color worn by the British military officers
In 1902 the British army adopted a universal khaki uniform for home service wear, the Service Dress, because of the early use of camouflage in the form of plain khaki.

Question: Why the change of color
Self-contained rewrite: Why the change of color for British military uniform