Display color lab
Test grayscale separation, smooth gradients, shadow detail, highlight detail, RGB transitions, and panel uniformity with full-screen patterns.
Grayscale steps
Every block should be distinct, from pure black through neutral gray to white.
1. Let the display warm up and disable automatic brightness or blue-light filters. 2. Use your normal viewing position and moderate room lighting. 3. Run each pattern full screen and inspect the center, edges, and corners. 4. Repeat after changing only one monitor setting at a time.
Visible bands may indicate limited color depth, compression, or an aggressive display mode. Lost dark blocks suggest black crush; merged bright blocks suggest white clipping. Uneven gray can reveal backlight variation, viewing-angle effects, or panel tint. This visual test does not replace hardware calibration.
This page evaluates how a display reproduces tones and transitions. For isolated black, bright, or stuck dots, use the Dead Pixel Test. For resolution, refresh rate, and browser-reported display information, use Display Check.
Continue with the next check that best matches the symptom you are troubleshooting.
Troubleshooting Center
Start with the symptom
Best next step
Use full-screen solid colors to spot dead pixels, stuck pixels, and uniformity issues.