Écran rouge

A pure red channel reveals permanently stuck or failing red subpixels that other colors can hide — one of the first screens to run in a diagnostic pass.

Use the dead pixel test tool

A warm red fill neutralizes cool, unflattering room illumination on webcam sessions and adds a cozy glow to evening streaming.

Red light doesn't ruin your eyes' dark adaptation. A red full-screen is ideal for dark rooms, astronomy, and late-night work.

Red is a classic darkroom safe light — use a red full-screen when handling light-sensitive materials.

Select the écran rouge tile on this page, then press Go Full Screen. Your browser fills the entire screen edge-to-edge with #e11d2e. Tap anywhere or press Escape to exit.

Yes. Open the écran rouge on a second device or window, position it behind you, or use it as a light source to evenly light your face on a call.

Yes. Pick the écran rouge color, choose a size preset or type a custom width and height, then press Download PNG. You'll get a lossless, high-quality image at exactly that size, rendered in your browser — nothing is uploaded.

Yes, this tool is 100% free and works entirely in your browser. No account, no sign-up, and no images are uploaded or stored.