RGB Test Pattern
Fullscreen tool for display testing. Works in-browser, no signup.
SMPTE-style color bars for monitor calibration. Grayscale gradient underneath tests contrast + banding.
About this tool
SMPTE-style color bars — silver, yellow, cyan, green, magenta, red, blue — with a grayscale gradient underneath. This is the industry-standard broadcast test pattern used since the 1970s for calibrating color monitors. If any bar looks the wrong hue, your display or your video card's color profile is off.