Bezold Effect — The same red changes character when surrounded by black or white.
Look closely. Let the image settle.
Color & afterimages / 19th century

Bezold Effect

The same red changes character when surrounded by black or white.

TRY THIS

Compare the red in the two patterns while covering some of the surrounding black or white.

FOLLOW THE SOURCES

History, evidence & image credit

THE IMAGE IN THIS ARCHIVE

This vector image was created with Inkscape by Lockal, and then manually replaced.

Original file & attribution · Public domain

Original image downloaded from Wikimedia Commons; the downloaded file is unchanged. Gallery previews may be resized or converted to WebP; animated previews show the first frame.

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Frequently asked questions

What is Bezold Effect?

The same red changes character when surrounded by black or white.

What should I look for in Bezold Effect?

Compare the red in the two patterns while covering some of the surrounding black or white.

What explains Bezold Effect?

The surrounding small elements influence the appearance of a repeated color. In this illustration the red regions have the same color but belong to different black-and-white arrangements.

Bezold Effect — The same red changes character when surrounded by black or white.

Bezold Effect