It does look slightly modern, a bit like American football clothes. I guess it depends on where he's staying over winter, on his (tribal) traditions and possibilities to obtain materials for clothmaking or already sewn clothes. You could stay with his classic colour scheme, though it might depend on the material: Not all materials usually come in all sorts of intense colours. And, depending on his environment, it might not always be good to wear striking colours in white snow. At least it makes you easy to spot.