Re: yellow with no green
I have noticed that yellow seems to have one of the narrowest ranges of any color within which it is still recognized as itself. It doesn't take much to shift a yellowish color to being identified as "greenish" or "orangey".
You can shift a "red" pretty far and people will still call it "red", likewise for blue, green, or purple. But with yellow, just a little bit of change and it's no longer really "yellow" to people.
I don't know if this is a property of light, pigment, or psychology.
"Let the paint be paint" --John Marin