Screen Color Test
Cycle through solid colors to test your monitor, TV, or phone for dead pixels, stuck pixels, and color accuracy. Free fullscreen tool.
How does this test work?
A screen color test cycles through solid colors like black, white, red, green, blue, cyan, magenta, yellow, and gray in fullscreen to help you find dead or stuck pixels and check color uniformity on any display.
How to use the Screen Color Test
Open the Screen Color Test on any device with a modern browser — desktop, laptop, tablet, or phone. No downloads, plugins, or signup required. The tool loads instantly and works in Chrome, Firefox, Safari, Edge, and other Chromium-based browsers.
Follow the on-screen instructions to run the test. Results are displayed immediately in your browser. You can repeat the test as many times as needed. For the most accurate results, close other tabs and applications to reduce interference.
Privacy: This test runs entirely in your browser using standard web APIs. No data is collected, uploaded, or stored on any server. Camera, microphone, keyboard, mouse, and controller inputs are processed locally and never leave your device. DeviceKit does not use analytics cookies or tracking scripts.
Browser note: Some hardware values are estimated because browsers limit direct access to device hardware for security and privacy reasons. Results may vary slightly between browsers and operating systems. For the most reliable measurements, use an up-to-date version of Chrome or Edge on a desktop computer.
Frequently Asked Questions
How many colors should I test with?+
Test with at least black, white, red, green, and blue. For thorough testing, also use cyan, magenta, yellow, and various gray levels.
Related Tests
Dead Pixel Test
Run a free dead pixel test in fullscreen. Check monitors, laptops, phones, tablets, and TVs for dead or stuck pixels using solid color screens.
Black Screen
Display a full black screen to check for stuck pixels, backlight bleed, screen uniformity, and OLED burn-in. Works on monitors, TVs, phones, and tablets.
White Screen
Display a full white screen to find dead pixels, check screen brightness uniformity, and clean your display. Works on all devices.
Backlight Bleed Test
Use a fullscreen black screen to check your monitor, laptop, or TV for backlight bleed, edge glow, clouding, and screen uniformity issues.