Black and White Level Test for Your Monitor
Inspect solid colors or gradients in fullscreen. Clean the screen first and compare suspicious spots across colors. Calculators require your actual resolution and physical diagonal.
Results
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How to use this tool
Inspect solid colors or gradients in fullscreen. Clean the screen first and compare suspicious spots across colors. Calculators require your actual resolution and physical diagonal.
| Results | Method and units |
|---|---|
| RGB | 0, 2, 4, 8, 12, 16 / 239, 243, 247, 251, 253, 255 |
Example
RGB: 0 / 4 / 16 · 239 / 251 / 255
What this test can and cannot tell you
Results reflect events and signals available to your browser. Settings, permissions and device support can affect them; they do not certify that hardware is healthy or faulty.