I did check with Pam and she said that Oregon does not have a red hue at all. So, not sure what you were seeing, just bad lighting I'd guesstimate.
I just want to clear up one thing. I DID NOT say that Oreo had a red hue. I said he looked brownish in a certain light and I could see stripes. There are many shades of brown and brown does not automatically = red hue. 😉 (For example: Chestnut brown and blackish/brown - blackish/brown was what I saw at the moment I was thinking of.) I wasn't saying he had a red undercoat like the pictures from Dan, he has a black undercoat and it takes a specific light to see the stripes.
Yes, you are most likely right - weird lighting, he could have also just been dusty. I was simply agreeing with the original poster, Dan, when he said he had seen their b&w look brownish.
It isn't unusual to see black (in general on anything) look like other colours depending on lighting - many times it looks blue. 😉