Why is green the primary colour in camouflage? We delve into the evolutionary origins of camouflage and the remarkable adaptability of the human eye through the history of Chromium Oxide Green.
The human eye can see more different types of green than any other colour. We have always lived in largely green habitats, and so in identifying different types of food or prey in our environments, it was important for us to differentiate different types of green.
This skill is not exclusive to the human species. Others have found ways of responding to green to survive. For example, the walking-leaf insect adopts not only the green colour of its environment but the very shapes and surface texture of leaves to achieve a perfect camouflage.
In the pigment world, Chromium Oxide Green, or Chrome Green, has a camouflaging quality. Produced during the boom of synthetic pigments in the 19th century, it is one of the most stable green paint pigments, and its metallic vitreous green surface has a camouflaging moss-like appearance.
Not surprisingly, then, one of the most common uses for Chrome Green is camouflage paint. Until the 18th century many military uniforms were purposely brightly coloured to be seen from afar by the enemy. The British Army were the first to recognise the advantages of disguise in 1850. They began to dye their otherwise bright white uniforms a sandy off-white colour designed to blend in with the desert. They called these new uniforms ‘khakis’, the Hindu term for ‘dust’. Blending in, rather than standing out, became widespread as a military tactic.
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