Gamma Adjustment Chart

Gamma correction is meant to compensate for the annoying fact that most computer monitors do not display colors linearly. PCs are worse than Macs. The middle colors are usually too dark; middle gray looks darker than a black and white checkerboard even though they should look the same.

This chart consists of four panels each containing a fine checkerboard surrounded by a solid border. The Borders are color number 128 and the checkerboards are alternating colors 1 and 255.

If your monitor gamma is adjusted correctly the chart will appear as four uniform squares of gray, red, blue, and green.