I'm restraining myself...and just how would a
jaundiced eye perceive yellow snow? White and untainted? Anyone with some lemonade and a pair of appropriately tinted glasses/goggles can put this too to the test.
Speaking of yellow eyes, do we know the color variation of the elven eye, and just what spectra are perceptible from the same? Elves see things that remain unseen to the human eye (moon letters, portends, running orcs at great distances, etc). Do elves see the thicker patches of snow, and again, just know where to step? Do they guard this secret to make themselves more interesting?