In a recent 2019 study (doi.org/10.1098/rsif.2019.0183), researchers from the University of Bristol discovered that orange fur is actually good camouflage in the wild. This is because most mammals are dichromats, meaning that they only have two colour receptors in their retina, and this makes them unable to distinguish red from green. In other words, most mammals see green instead of orange, which makes orange fur blend pretty well with the surrounding greenery.

It turns out that since no mammal has managed to develop green fur, orange fur is actually the next best-thing, as far as camouflage is concerned. Humans however are trichomats, and unlike most other mammals can pick out the orange colour with ease.

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