4014761A Treatise on Painting — That no reflected Colour is simple, but is mixed with the Nature of the other ColoursJohn Francis RigaudLeonardo da Vinci
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Chap. CCLXXVII.—That no reflected Colour is simple, but is mixed with the Nature of the other Colours.
No colour reflected upon the surface of another body, will tinge that surface with its own colour alone, but will be mixed by the concurrence of other colours also reflected on the same spot. Let us suppose A to be of a yellow colour, which is reflected
on the convex C O E, and that the blue colour B be reflected on the same place. I say that a mixture of the blue and yellow colours will tinge the convex surface; and that, if the ground be white, it will produce a green reflexion, because it is proved that a mixture of blue and yellow produces a very fine green.
