I have a downloaded paint chart for all kinds of paints that I got from Micro Scale Industries. It contains all kinds of paints from a bunch of companies like Model Masters, Testors, (Floquil), Tamiya, and others. The charts lists the color, manufacturer, part number, color name, paint type, and sheen level. This chart is actually titled "Floquil Color Chart Cross Reference". Of course all these are for use in with an air brush and are not spray cans.
The chart is a PDF download. The address is: https://www.microscale.com
This paint chart has a number of green paint types listed by rail road name. It isn't necessarily an American Flyer accessories paint list but I have found 2 different green shades that have matched what I was painting.
Also in the body of this chart you will find a listing for Hornby America which becomes "Humbrol Acrylic Paints" when you click on it. There is actually a place for more than acrylic paint to choose from. There you will see an assortment of paint "splashes" showing what the paint shades they have. Handy for seeing what shade a given paint is. I have never bought from them before but thought that color chart would be handy if I ever did. Seems to me I also found I green shade at Menards in the Rustoleum brand too. Sorry I can't tell you the color name. I have that in my "secret" files where it wouldn't be lost. Translation, that file is so secret I can't remember which binder it is in.
I hope some of this information helps.