PC: PC Green Color Variants

[Edward Bulman <ebulman@xxxxxxxxxxxxxxxxx>]

I recall at least two distinct caboose colors, one a more "blue-green"
green, like a deep jade green, and a medium green color. I have a rock
that got oversprayed when it was stuck on the floor grates of transfer
caboose # 18013. If I can find it again, I'll use it to mix my paint.