Blue Screen

About the Blue Screen

This page is a plain blue screen. Press Full screen and your whole display turns blue — no buttons, no text, nothing else.

People use a blue screen as a calm blue light for a room, a photo or a video, as a small blue chroma key backdrop, and as a blue pixel test for a screen. It is just the colour: there is no fake error message on this page.

It runs in your browser. Nothing is installed and nothing is sent anywhere.

Features

• Opens blue — the page is already pure blue, one click for full screen
• Any blue — use Your colour to pick a lighter or darker shade
• True full screen — no menus or text on top of the colour
• Brightness slider — make the blue darker, down to 10 %
• Keep the screen on — the screen does not go dark while it is on
• Other colours — white, black, red, green, yellow, pink or any colour you pick

What people use a blue screen for

• Blue chroma key for small things. Put a small object in front of the screen and let a video app swap the blue for another background. Blue is the better choice when the object itself is green.
• Mood and party light. Fill a room with blue for a film night, a photo or a game.
• Photo and video effects. Hold a phone with a blue screen near a face for a cool blue glow.
• Blue pixel test. On a full blue screen, a pixel whose blue sub-pixel has failed shows as a dark dot.
• Check colour and uniformity. Look for patches that are lighter or darker than the rest.

If your computer shows a blue error screen

This page is only a colour. If your Windows PC stops on a blue screen with an error message, write down the stop code (for example CRITICAL_PROCESS_DIED). Then restart. If it happens again, these simple steps often help:

• Unplug new USB devices and undo recent changes.
• Install Windows updates and new drivers.
• Run the built-in Memory Diagnostic and check the disk.
• Search the stop code on the Microsoft support site.

How to use it

• Press Full screen — the whole display turns blue
• Use the Brightness slider or Your colour to change the shade
• Move the mouse or tap to see the Exit button again
• Tap a colour below the screen to change the colour, or press ← → in full screen
• Press Esc or double-click to leave full screen

Frequently asked questions

Is this the Windows "blue screen of death"?

No. This page shows a plain blue colour and nothing else. It does not show or copy any error screen.

Can I use a blue screen as a chroma key?

Yes, for small things in front of a monitor or TV. Blue works best when the object has green in it. For green-free objects, the Green Screen is usually the better choice.

Does blue light keep me awake?

Bright blue light in the evening can make it harder to fall asleep for many people. For a light at night, a dim Red Screen is gentler.

Can a blue screen find dead pixels?

A blue screen shows a failed blue sub-pixel as a dark dot. To check every kind of fault, also look at white, black, red and green. The Screen Test steps through them all.

Is it free?

Yes. It is free, with no sign-up and no download.

Related tools

• Green Screen — a plain green screen, for a green chroma key
• Screen Test — every test colour in a row, to find dead and stuck pixels
• Black Screen — a plain black screen, to see dust and stuck pixels
• Color Picker — find the exact code of any colour
• More colour screens — White · Black · Red · Green · Yellow · Pink