Bezold effect

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Demonstration of the Bezold effect. The red seems lighter combined with the white, and darker combined with the black.
Demonstration of the Bezold effect. The red seems lighter combined with the white, and darker combined with the black.

The Bezold effect is an optical illusion, named after a German professor of meteorology, Wilhelm von Bezold (1837-1907), who discovered that a color may appear different depending on its relation to adjacent colors.

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