I've owned a couple of green Aero's, first a Series I in Audi Mint Green:
And then, a Series II in Reflex Green:

Though that one did have a hint of purple (and blue and grey) in it!
So you can guess the way I voted! I don't mind red cars either, but
black brown (I'll never hear the last if I underwrite the colour of BtG's Aero

) always looks nice too...