I'm inclined to agree with Keith's description of the green colour.
I've described it as the colour of a lemon just as the colour starts to change when the fruit starts to ripen. Years ago—I wasn't 10—my dad brought home two promo model Cadillacs that he had been given in his work for a GM dealer. One was a pink, early fifties convertible, the other was a pale yellow/green convertible described as I remember.
The pic below is a first generation copy, that came via the Society of Air Racing Historians from, I think, the original photographer, Aaron King. I hope it helps.
Remember the red was described as Chinese Red but all the Chinese Red that I have seen is darker than this.