It's a shame that most pictures I see where the PR has a brownish color, the picture itself is an old analogue and everything in the picture looks yellow/brown. It's so frustrating to not be able to tell how much of the actual color is reddish brown, and how much is the picture.
This was very enlightening though:
Show The Stuff Dreams Are Made Of, Ep The M41-A Pulse Rifle - 7 Oct 2021
podcasts.apple.com
They have a very deep discussion about the color at the 1:13:15 mark.