I recall getting red pistachios from a machine.
Twenty Five Cents in the slot would give you a handful of the red dyed nuts.
I always presumed the dying stopped because of popular fears about Red Dye #2. This was used on apples, in candy and on some meats. Plus, we lost all of our colored toilet tissue in the late 80’s as well! Now, nothing but government approved flat white for all.
I don't know about government approved or dictated colors for toilet paper. But, I have only purchased white toilet paper as I developed allergies to the dyes. I have not even realized that toilet paper is all white.