I've been looking for the origins of green as the colour of envy.
So far all I can get is "green-eyed monster" from Othello and vague, hand-wavey remarks about ancient Green ideas about bile.
The Othello line strikes me as being a bit too specific (in "green-eyed") to be an entirely original thought. If green skin had been the prevailing association until then, then why not "green-skinned monster"?
To put it another way, could Shakespeare have expected his audience to connect green eyes with envy? The green of eyes is far more literal than the "green" of skin, which is more grey/pallid.
I suspect there's something in between, perhaps a myth or fable which isn't ranked highly in Google results.
Anyone know what it might be?