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Color & Calibration

Screen Color Test

Display pure black, white, red, green, blue and more, full-screen.

How to use

  1. 1Click Start to go full-screen.
  2. 2Use ← / → or tap left/right to switch colors.
  3. 3Look for tint, blotches, or dots that differ from the solid field.
  4. 4Press Esc to exit.

FAQ

Why test individual solid colors?

Solid red, green, and blue isolate each sub-pixel so defective sub-pixels and color uniformity issues become obvious.

Is there a dedicated black and white screen?

Yes — open the Black Screen or White Screen tool for a single, distraction-free color you can use for cleaning or backlight checks.

Tips

  • Solid red, green, and blue are best for spotting a defective sub-pixel.
  • A faint overall tint on the white field usually means your color temperature / white balance is off.

Related tests

Black ScreenA pure black full-screen for backlight, dust, and OLED checks.White ScreenA pure white full-screen for cleaning, lighting, and uniformity.Greyscale Test256-step ramp and smooth gradient to reveal color banding.Color GradientSmooth RGB gradients to judge color transitions and gamut.

Related guides

Learn more about what this test reveals and how to act on the results.

How to Test a Monitor Before (and Right After) BuyingWhat to check in the store and at home so you don't keep a monitor with dead pixels, bleed, or the wrong refresh rate.How to Test a New TV for Dead Pixels and UniformityUse your TV's browser or a phone to run solid-color and gray tests that reveal panel defects and dirty-screen effect.Dead vs Stuck vs Hot Pixels: How to Tell Them ApartThree different defects look similar but behave differently. Identify which one you have — and whether it's fixable.Dead Pixel Warranty Policies, ExplainedHow many dead pixels does it take to get a replacement? A practical look at ISO 9241 and manufacturer thresholds.