Nate has pink feet too. If he puts them up they get a bit more white again.
They also swell sometimes if he has been sitting a lot.
I believe I saw a post about it on the GBS Adult board.
The post if I remember correctly says that the peripheral nerves control the temperature as well as the skin color.
When they are damaged, they don’t function as well as when they weren’t damaged.
Makes sense to me why they are pink.