blue and green

?I have actually heard people say that blue and green were discordant; the two colours which Nature seems to intend never to be separated, and never to be felt, either of them, in its full beauty without the other!?a peacock?s neck, or a blue sky through green leaves, or a blue wave with green lights through it, being precisely the loveliest things, next to clouds at sunrise, in this coloured world of ours.?

?John Ruskin, from The Elements of Drawing, 1857.