Was it a trick of the light? This afternoon I stood and stared at the yellow fruit under this crab apple tree and the carpet of fallen leaves began to look purple. I can see it in the photograph too. I can guarantee that the leaves on their own looked brown. If this became a painting there would definitely be purple in the brown (apart from the lilac-coloured plastic object I’ve just noticed among the leaves!).
Lovely complementary colours in action.