Who said ' Anyone who sees and paints a sky green and pastures blue ought to be sterilized?

The quote "Anyone who sees and paints a sky green and pastures blue ought to be sterilized" is attributed to the American artist and illustrator, Ad Reinhardt. He was known for his abstract work and his strong opinions on art and aesthetics. This statement reflects his belief in a certain standard of artistic representation and critique of those who deviate from it.