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Color & Calibration

White Screen

A pure white full-screen for cleaning, lighting, and uniformity.

How to use

  1. 1Click Start for a full-screen pure white field.
  2. 2Look for dark dots (dead pixels) and smudges or dust.
  3. 3Press Esc to exit.

FAQ

What is a white screen used for?

Finding dark dead pixels and dust, checking brightness uniformity, lighting your face on video calls, and cleaning your display.

Tips

  • Great as a cheap softbox light for video calls in a dark room.
  • Dark specks that don't wipe off are usually dust between layers or dead pixels, not dirt.

Related tests

Color TestDisplay pure black, white, red, green, blue and more, full-screen.Black ScreenA pure black full-screen for backlight, dust, and OLED checks.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.

The Complete New-Device Screen Test ChecklistA 10-minute routine to inspect any new laptop, monitor, phone, or TV before the return window closes.How to Fix a Stuck Pixel (4 Methods That Actually Work)Flashing, the pressure method, and tapping — practical ways to revive a stuck pixel, plus when to stop trying.What Causes Dead Pixels (and How to Avoid Creating Them)Manufacturing defects, pressure, heat, and age all kill pixels. Here's what's in your control.How to Calibrate Your Monitor Without a ColorimeterGet noticeably better color and contrast by eye using built-in tools and test patterns — no hardware required.