A solid blue screen in fullscreen. Use it as a cool accent or background light for photos and streams, for blue mood lighting, or to check your display for stuck pixels.
How to use the blue screen
- Press F or the fullscreen button.
- Set the brightness, then place the screen to the side or behind your subject.
- Move the mouse or tap to bring the controls back. Press Esc to leave fullscreen.
Ways to use a blue screen
- Background and rim light
- Blue behind you separates you from a dark background, a popular look for streams.
- Cool mood light
- A blue screen in a dark room makes a calm, moonlit glow.
- Stuck pixel test
- A sub-pixel that is stuck off shows as a dark dot on blue. Check the red and green screens too.
- Chroma key
- Blue keys well when your subject wears green. For most uses, the green screen keys more cleanly.
Questions
Should I use a blue screen before sleep?
Better not. Blue light in the evening can make it harder to fall asleep. Use the red screen or a warm white at low brightness instead.
Is this the Windows "blue screen of death"?
No. This is a plain blue light. It has no error text and does not affect your computer.
How do I go fullscreen?
Press F on a keyboard, or use the fullscreen button in the bar at the bottom. Press Esc or F again to leave. On iPhone, Safari does not allow real fullscreen, so add the page to your home screen for the cleanest view.
Is it free?
Yes. There is no account, no download and no time limit. It runs in your browser and never asks for camera, microphone or location access.