What a blue screen is good for
Blue is the traditional chroma key colour for anything involving skin tones or blonde hair, where green spills badly. It is also the channel most likely to reveal panel uniformity problems, since blue subpixels are the dimmest of the three on most displays.
- Chroma key backdrops when green would spill onto hair or skin.
- Checking blue channel uniformity across a panel.
- Cool-toned fill light for photography and video.
How to use it
- Press Full screen, or click the icon in the corner of the preview. The colour fills the display and everything else disappears.
- Set the brightness and warmth to suit the room, and turn on Keep awake so the screen does not sleep.
- Press Esc to come back. Your settings stay in the address bar, so the link reproduces this exact setup for anyone you send it to.
Questions
Is looking at a blue screen bad for my eyes?
A blue screen emits very little light, so it is one of the easier things to look at for a long stretch. Eye strain comes from staring without blinking rather than from the colour, so look away every twenty minutes regardless.
Will my screen go to sleep while this is open?
Not if you turn on Keep awake. It uses the browser wake lock, which asks the operating system to keep the display on with no input until you leave the page. It works in Chrome, Edge, Safari and most mobile browsers.
How do I download a blue background image?
Open the download panel, pick a format and a size, and the blue image is generated in your browser and saved straight away. PNG, JPG and WEBP are available from 1×1 pixel up to 8K, with nothing stored on our side and no watermark.
Does the blue screen work on a phone, tablet or TV?
Yes. On a phone or tablet, add the page to your home screen and it opens straight into the blue screen. On a TV, open the link in the built-in browser or cast the tab, then use the fullscreen button.
Can I get a screen in an exact shade rather than this blue?
Yes. Any hex colour has its own page — put the code after /screen/, so #0000ff lives at /screen/0000ff. Those links are shareable, so you can send someone the exact colour you mean.
Put this screen on your site
The embeddable version is the screen and nothing else, sized to whatever box you give it.