Red Screen

By Cedrick Reese, WhitestScreen.com

A free fullscreen red screen for mood lighting, photography backdrops, and screen testing. Adjust the brightness, go fullscreen, or download it as a PNG at the resolution you need.

Red is also the traditional choice for astronomers, pilots, and darkroom photographers working in the dark, since it's less disruptive to eyes already adjusted to low light than white or blue would be. If you need a soft reading light overnight without fully waking yourself up, it works better than your phone's regular white backlight.

See all color screens →

Frequently asked questions

Why do photographers and astronomers use red light at night?

Red light has a long wavelength that doesn't trigger much breakdown of rhodopsin, the light-sensitive pigment in your eye's rod cells that handles night vision. That's why astronomers, pilots, and photography darkrooms use red light specifically: it lets you see well enough to work while your eyes stay adapted to the dark. A red screen works the same way in a pinch.

Is color therapy with a red screen backed by science?

Chromotherapy is a real practice some people use for relaxation or mood, but it isn't a medically validated treatment, and there's no solid clinical evidence it treats any condition. Using a red screen for a calming atmosphere or a photography backdrop is a legitimate use. Just don't treat it as medicine.

The red used here is a fully saturated primary red, close to the reference value manufacturers use when testing a panel's red subpixels, which is why it works for screen testing and not just mood lighting. It's checked periodically to confirm it still renders as true red rather than drifting warm on certain displays.

About the creator

Ready Utilities was founded by Cedrick Reese, a retired veteran and web developer who enjoys building free, user-friendly online tools that simplify everyday tasks. Read more →