Test Your Monitor Color Accuracy Online

Gamma 2.2 is the standard brightness curve for most monitors and web content. If your display gamma is off, images will look too dark or washed out. The gamma test pattern helps you verify this without specialized hardware.

On a well-calibrated monitor, you should see all 10 dark squares (values 1–10) and all 10 bright squares (245–254). If you see fewer than 7 in either test, your monitor's contrast or brightness may need adjustment.

Banding appears as visible steps instead of smooth transitions. Common causes include 6-bit panels (displaying only 262K colors instead of 16.7M), aggressive compression in HDMI/DisplayPort settings, or incorrect color depth in your graphics driver.

No calibration is needed to run the test. This tool helps you evaluate your monitor's current state. If results are poor, you can then adjust brightness, contrast, and gamma in your monitor's OSD menu or use a hardware colorimeter for precise calibration.

Yes, the test works on phones and tablets. However, phone screens often have different gamma curves and adaptive brightness that may affect results. For the most accurate test, disable auto-brightness and use a desktop monitor.