A Treatise on Painting
by Leonardo da Vinci, translated by John Francis Rigaud
Of the different Effects of White, according to the Difference of Back-grounds
4010516A Treatise on Painting — Of the different Effects of White, according to the Difference of Back-groundsJohn Francis RigaudLeonardo da Vinci

Chap. CCXII.Of the different Effects of White, according to the Difference of Back-grounds.

Any thing white will appear whiter, by being opposed to a dark ground; and, on the contrary, darker upon a light ground. This we learn from observing snow as it falls; while it is descending it appears darker against the sky, than when we see it against an open window, which (owing to the darkness of the inside of the house) makes it appear very white. Observe also, that snow appears to fall very quick and in a great quantity when near the eye; but when at some distance, it seems to come down slowly, and in a smaller quantity[1].

  1. The appearance of motion is lessened according to the distance, in the same proportion as objects diminish in size.