Green Screen
Press Start green screen to fill your whole display with chroma key green. Use it as a lit backdrop for keying small objects, as a quick green background on a second monitor, or to check a screen for uniformity. Pick #00B140, pure #00FF00, chroma blue or any custom hex shade.
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F or click: full screen · Esc or double-click: exit · ←→ preset
Esc or double-click to exit · F or click for full screen · ← → change color
How to use the Green Screen
- Pick a color: Chroma green (#00B140) for most cameras, Pure green (#00FF00) for digital keying, or type any hex code.
- Adjust brightness if the screen is too bright on camera or spills green light onto your subject.
- Choose options: plain color, tracking markers or a framing grid, hidden cursor and an optional auto-exit timer.
- Press Start green screen. The page fills with the color and tries to enter full screen; use the arrow keys to switch presets.
- Press Esc (or double-click, or tap Exit) to return. Use Download PNG to save the same color as an image for your video editor.
Chroma key colors compared
| Preset | Hex | RGB | Best for |
|---|---|---|---|
| Chroma green | #00B140 | 0, 177, 64 | Camera work against a screen; the standard green-screen paint and fabric color |
| Pure green | #00FF00 | 0, 255, 0 | Digital backgrounds, graphics, OBS and editor overlays keyed in software |
| Studio green | #14A84A | 20, 168, 74 | Softer green when a bright screen causes spill on skin or hair |
| Dark green | #008A3A | 0, 138, 58 | Low-light rooms and cameras with limited dynamic range |
| Chroma blue | #0047BB | 0, 71, 187 | Subjects wearing green, fine hair detail, night scenes |
| Pure blue | #0000FF | 0, 0, 255 | Digital blue-screen graphics and overlays |
Tips for a clean key with a screen backdrop
- Keep the subject away from the screen. Even 30 to 50 cm of distance reduces the green light that bounces onto edges (spill) and keeps shadows off the backdrop.
- Lower the brightness before you add light. A monitor at full brightness can be several stops brighter than your subject. Use the brightness slider, then light the subject separately.
- Lock your camera settings. Turn off auto exposure and auto white balance so the green stays the same shade through the whole take; the keyer then only has to remove one color.
- Avoid moiré. Filming a screen up close can show wavy lines. Defocus the backdrop slightly with a wider aperture, or change the camera distance a little.
- Use markers only when the camera moves. Tracking crosses help match movement in post; for a tripod shot, plain color keys more easily.
- Nothing green on the subject. Green clothes, plants or reflective surfaces will key out too. Switch to chroma blue if you cannot avoid green.
Using green screen as a display test
A single solid color is the easiest way to see a panel's flaws. On green, a dead pixel shows as a black dot and a stuck pixel as a red, blue or white dot. Look along the edges for tint (a yellow or blue cast) and darker corners, which point to uneven backlighting. For a full check, cycle through red, green, blue, white and black in the Dead Pixel Test.
Frequently asked questions
What is the hex code for chroma key green?
The most common chroma key green is #00B140 (RGB 0, 177, 64), the color usually listed for green-screen paint and fabric and close to Pantone 354 C. Pure digital green is #00FF00 (RGB 0, 255, 0). Either keys well; what matters most is that the backdrop is evenly lit and its color does not appear on your subject.
Should I use #00FF00 or #00B140?
#00FF00 is the purest green a screen can show and is ideal for digital backgrounds, graphics and overlays that you key in software. On camera, #00FF00 on a bright monitor can look harsh and throw green light on your subject, so the slightly darker #00B140 or a lower brightness often keys more cleanly.
Can I use my monitor or TV as a green screen?
Yes, for small subjects: product shots, hands, toys, phones or a head-and-shoulders shot close to a large TV. A glowing screen is evenly lit by itself, which helps keying. For a full body you need a bigger fabric or painted backdrop. Turn the screen brightness down if it causes green spill or a halo.
Why is green used for chroma key instead of other colors?
Green is far from human skin tones, rarely worn in clothing, and most camera sensors have twice as many green photosites as red or blue (the Bayer pattern), so the green channel is the cleanest and least noisy. Blue is preferred when the subject wears green, for hair detail in low light, or for night scenes.
What are the tracking markers for?
The small crosses give motion-tracking software fixed points to follow when the camera moves, so the replacement background can move with the shot. They are easy to key out or paint out afterwards. Turn them off for static shots.
Can I download a green screen image?
Yes. Choose a size (1920 x 1080, 4K, 720p, vertical 9:16, square or your own screen resolution) and press Download PNG. The image is created in your browser in the exact color shown, including the brightness setting.
Is the green screen a good test for my display?
A full-screen solid color is a quick way to spot dead or stuck pixels, uneven backlight, tint shifts at the edges and dirt on the panel. Green is especially useful because the green subpixel is the brightest one, so a dark spot shows up clearly.
Are all the tools on FreeToolCabin tested for quality and accuracy?
Yes! Every tool on our site undergoes automated Q/A testing in real browser environments to ensure high precision, correct output, and zero errors. If you happen to spot a bug or have a suggestion, please contact us at [email protected] and our team will review it right away.