Green Screen.
Open a green screen in full screen, explore shades, or download a solid green background.
Choose your color
Click to previewScreen settings Dimming & keep awake
This changes the displayed color. Adjust your device brightness for a brighter or dimmer screen.
Works only while this page is visible. Your system may still interrupt it.
Download a plain background
#FFFFFFA clean, solid image. No border, watermark or dimming.
Key takeaways
- This page shows #00FF00, which CSS calls "lime"; the CSS colour named "green" is the darker #008000.
- Green is the brightest of the three primaries: about 72 % of white.
- A full green screen is a bright, even background for a small chroma-key shot.
Pick a color
Start with green, choose a preset or enter your own HEX code.
Make it full screen
Open the color across your screen. Press Escape or tap Exit to return.
Take it with you
Download a plain PNG or JPG in the size that fits your project.
Pure green, ready for your screen.
This green screen uses #00FF00 (RGB 0, 255, 0). It can provide a plain green reference or background image. It does not automatically remove or replace a background in a video call; that requires your video software.
Is #00FF00 the same as "green" in CSS?
No. In CSS, green is #008000 (RGB 0, 128, 0), and #00FF00 is named lime. This page uses #00FF00, the pure green subpixel at full strength, because that is what most people mean by a green screen. You can enter #008000 as a HEX code to see the darker one.
Why is green used for chroma key?
Green is far from skin tones, so software can remove it without removing people. Camera sensors also collect more green than red or blue (the common Bayer filter has twice as many green photosites), which helps keep a green background clean. A phone or monitor showing green works for small objects; for people you need a lit backdrop.
Find your color.
Questions, answered.
Why does the green screen look so bright?
Green alone gives about 72 % of the luminance of white in the sRGB weighting.
Will this replace my video background?
No. This page only displays a solid color. Use background settings in your calling or editing app to change your background.
How do I leave full screen?
Press Escape or move your mouse or touch the screen to reveal Exit. Press F to toggle full screen when you are not typing in a field.
Does it work on phones and tablets?
Yes. If your browser cannot open true full screen, the color fills the browser window instead. Browser bars may remain visible. You can use portrait or landscape orientation.
Can this change my device brightness?
No. Screen dimming darkens the displayed color only. Use your device’s brightness controls to adjust the physical display.
What does Keep screen awake do?
When supported and allowed, it asks your browser to keep the display on while this page is visible. The status shows whether the request is active, released or unavailable. Battery settings and system behavior may override it.
Can I download a 4K background?
Yes. Choose 4K UHD for a 3840 × 2160 image. Images are created on your device and contain the selected base color only, without the dimming effect.
Sources: W3C, CSS Color Module Level 4, named colors; W3C, WCAG 2 definition of relative luminance. Last reviewed November 12, 2026.