Solid Colour Screens

Open the colour you want from the grid above and press F, or click the fullscreen button on the screen itself. The whole display fills with that one flat colour and every bit of interface disappears. Escape brings the page back. Nothing is installed and nothing changes on your computer — it is one web page showing one colour.

Yes. The custom colour screen takes any hex value, RGB triplet or colour name and fills the screen with it. The value is written into the address bar, so the exact shade becomes a link you can bookmark, share or reopen later on a different machine.

White first, for dead pixels and dust. Then black, for backlight bleed and stuck pixels. Then mid grey, which is the only one that shows uniformity problems clearly. After that run pure red, green and blue in turn — each lights one subpixel channel on its own, so a channel that has failed shows up as a black dot on a field of colour.

The common reasons are testing a display, lighting a face on a video call, chroma keying a green or blue background, calibrating another screen against a known colour, using a phone as a coloured photography gel, and covering a monitor with a blank screen while you step away from it.

On an OLED or AMOLED display, yes — black pixels are switched off entirely, so a black screen draws measurably less power. On an ordinary LCD it makes almost no difference, because the backlight stays on at the same brightness regardless of what colour the pixels in front of it are showing.

Yes. Each colour screen has a download button that saves a PNG at your display's resolution, which is useful as a desktop background, a video call backdrop or a test file to open in something else.

It is free with no account, no signup, no trial and no limit on how long you leave a screen open. There is nothing to install and nothing to pay for.