"Colour symbolism is an abstraction and we cannot work this abstraction without language; so this is a proxy for trying to find in the archaeological record real echoes for the emergence of language," Dr Barham told the British Association's Science Festival.

Very interesting, although I don't see why you couldn't deal with colors without language. You couldn't tell if something is red or blue, per say, but you could certainly associate some meaning with it being one or the other just because you'd see they're different. No?