Display Tools  /  Color Screens

Full Screen Color Tools

A solid, edge-to-edge fill is the simplest panel diagnostic there is. A pure white fill exposes dust and dark (dead) sub-pixels; a pure black fill exposes stuck-lit pixels, backlight bleed and IPS glow; the primaries isolate a single sub-pixel channel at a time.

  • 14 solid fills
  • One-tap fullscreen
  • Works on TV & phone
  • No install

All Color Screens

14 tools ← Display Tools hub
White Screen Display a pure white screen fullscreen for dead pixel testing, screen cle… Purple Screen Display a rich purple screen fullscreen for creative lighting, mood setti… Pink Screen Display a soft pink screen fullscreen for ambient lighting, photography b… Cyan Screen Display a cyan screen fullscreen for cool ambient lighting, display testi… Lime Screen Display a lime green screen fullscreen for vibrant lighting, display test… Teal Screen Display a teal screen fullscreen for professional ambient lighting and di… Black Screen Display a pure black screen fullscreen for stuck pixel detection, OLED bu… Red Screen Display a pure red screen fullscreen for sub-pixel testing and ambient re… Green Screen Display a pure green screen fullscreen for chroma key backgrounds, green… Blue Screen Display a pure blue screen fullscreen for blue sub-pixel testing and ambi… Yellow Screen Display a pure yellow screen fullscreen for warm ambient lighting and dis… Orange Screen Display a warm orange screen fullscreen for ambient lighting, display tes… Magenta Screen Display a vibrant magenta screen fullscreen for creative lighting, displa… Warm White Screen Display a warm white screen fullscreen for soft ambient lighting, eye com…

What a solid fill actually reveals

  • White — dust, smudges, and dark dead sub-pixels. Clean the panel before you count anything.
  • Black — stuck-lit pixels, backlight bleed at the edges, IPS glow in the corners, and clouding across the middle.
  • Red, green, blue — isolate one sub-pixel channel; a pixel that fails on only one primary has one dead sub-pixel, not a dead pixel.
  • Warm white and gray tones — tint and uniformity differences that a pure white hides.

Other uses for a full-screen colour

  • A white fill is a usable soft light source for a video call or a close-up photo.
  • A black fill removes a second monitor from view without switching it off.
  • A solid colour makes a clean, distraction-free background for a screen recording.

Color Screens — common questions

Which colour should I use to find a dead pixel?

Start with white to find dark dead pixels and dust, then black to find stuck-lit ones, then red, green and blue to identify which sub-pixel has failed.

How do I make the colour fill the whole screen?

Open the colour page and press F11, or use the fullscreen button on the page. Escape returns to the browser.

Can I use a white screen as a light source?

Yes. A white fill at high brightness is a usable soft key light for a video call or a close-up photo, though a phone screen is small enough that you need it close.

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