I’m sure there were other colors as well, but the only bakers’ boxes (like for cakes and not just donuts) I remember from the '60s, '70s, and '80s were pink pasteboard, often with a string. That was in LA, DC, NY, and FL. I don’t really go to donut shops anymore, the last time was probably 10 or 15 years ago.
That was LA, DC, NY, and FL.