Quotation from: The Notebooks of Leonardo Da Vinci
Written by: Leonardo da Vinci
On the lighting of the background (562-565).
562.
OF THE BACKGROUNDS FOR PAINTED FIGURES.
The ground which surrounds the forms of any object you paint should
be darker than the high lights of those figures, and lighter than
their shadowed part: &c.
563.
OF THE BACKGROUND THAT THE PAINTER SHOULD ADOPT IN HIS WORKS.