Screen Color Test - Fullscreen RGB and Color Check
Run a fullscreen screen color test with RGB, CMY, grayscale and solid-color pages to check tint, color uniformity and visible marks.
Quick answer
A screen color test checks whether solid RGB, CMY, white, black and gray screens look clean and even across the display.
Method: ScreenTestKit generates the test surface in your browser. Results depend on visual inspection; the site does not read or diagnose physical panel hardware.
How to use this test
- Start with normal brightness and disable strong blue-light or night-shift filters if you want a neutral color check.
- Cycle through red, green, blue, cyan, magenta, yellow, white, black and gray fullscreen pages.
- Pause on any color that reveals tint, stains, stuck subpixels or uneven brightness.
- Use the monitor color test or uniformity test if the issue appears across several colors.
What to watch for
- Color tint that changes from one side of the screen to the other.
- Dust-like spots, pressure marks or stains that are visible on light colors.
- Bright subpixels that appear only on specific colors.
- Uneven gray or white areas that may indicate panel uniformity issues.
How to interpret results
Only one color looks wrong
The issue may involve a subpixel, color channel, display profile or browser color setting.
Gray or white looks uneven
Run the screen uniformity test to separate tint, dirty screen effect and brightness variation.
A fixed dot appears
Run the dead pixel and stuck pixel tests to classify it before deciding what to do next.
Frequently asked questions
Is this a calibration tool?
No. It is a visual color check, not a professional colorimeter or calibration workflow.
Why do colors look different in different browsers?
Browser color management, display profiles, HDR settings and night modes can affect how colors appear.