PERSPECTIVE.
Every object devoid of colour in itself is more or less tinged by the colour [of the object] placed opposite. This may be seen by experience, inasmuch as any object which mirrors another assumes the colour of the object mirrored in it. And if the surface thus partially coloured is white the portion which has a red reflection will appear red, or any other colour, whether bright or dark.
PERSPECTIVE.
Every opaque and colourless body assumes the hue of the colour reflected on it; as happens with a white wall.
Taken from The Notebooks of Leonardo da Vinci edited by Jean Paul Richter, 1880.