Professional full-screen color display tool for photography, lighting, and screen testing
Blue Screen
How to use a pure blue full screen for testing, keying and lighting
A full blue screen is used to test a display's blue sub-pixels, as a blue chroma key background, as cool accent lighting for photos and streams, and as a calm ambient light.
No. This page simply shows a solid blue color and does not affect your computer in any way. The Blue Screen of Death is a Windows error screen; our tool is a safe, plain blue display you can close at any time by clicking or pressing Esc.
Blue is a good choice when your subject wears green or has green in the scene, and it tends to cause less color spill on the subject. Green is usually brighter on camera and keys more easily in low light. Try both and keep whichever gives the cleaner edge.
On a pure blue (#0000FF) screen only the blue sub-pixels are lit. Look for black dots, which are dead blue sub-pixels, or red, green or white dots, which are stuck sub-pixels. Combine this with the red and green screens for a full sub-pixel test.
It is best avoided right before bed. Blue light is the part of the spectrum most linked to delaying sleep, so for evening lighting a warm color such as orange, beige or red is a better choice.
Yes. Choose 720p, 1080p, 4K or a custom size and click Download to save a solid blue PNG for wallpapers, chroma key backgrounds or design work.