One of my biggest findings in life has been that "history" is always "recorded" in the interests of someone or something, no exceptions. Accuracy is merely an occasional byproduct that isn't actually important.
Yep I got an Amber monitor with my Franklin Apple clone December 1982. So definitely not just a few years in the late 80s. They were never common green much more widespread.
I also distinctly remember a friend of mine having an Amber monitor around that time for what I though was an Apple but could be mistaken. I was jealous, my dad had a CP/M machine with a green screen