Definitely Driftwood. The driftwood can also be a chameleon color, but not a strong one. Seeing that your pic was in a forest of pine trees, the tideland should reflect a strong greenish tint even at sunset, which it does not. It is definitley tan. The same shade as my driftwood when it is on on my driveway next to my fir tree.
ah. nobody takes them off around here. I've seen hundreds of prius around here with 100% of them all stock tires with rings attached. except mine of course.