44 Fewer Shades of Gray

Stephen R. Wilk

A historical tour of color theory and the neutral value scale.

Mountins in fog[Getty Images]

Some time ago, I was looking at a ColorChecker Chart—a handy tool that is widely used to check on the response of cameras, films, and, increasingly, camera systems to a standardized series of colors. The rectangular chart comprises 24 colored squares arranged in four rows of six.

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