How to Chroma Key in Photoshop: Easy Green Screen

What You’ll Need

Adobe Photoshop (any recent version; menus may differ slightly)
A photo with a solid, evenly lit green or blue background
A replacement background image (optional)

Step-by-Step

Open your image – Launch Photoshop and open the photo with the green screen background. Duplicate the layer (Ctrl+J / Cmd+J) so you keep the original untouched.
Make a rough selection – Use the Quick Selection tool or the Select Subject button (Select > Subject) to select the person or object in the foreground. This gives you a starting point; you’ll refine it later.
Refine the edge – With the selection active, click Select & Mask (or Refine Edge in older versions). Use the Edge Detection brush to paint along the hair or fuzzy edges. Set Output to “Layer Mask” and click OK.
Clean up the mask – In the Layers panel, you now have a layer mask. Use a black brush to hide any leftover green fringe, and a white brush to reveal any parts of the subject that were accidentally removed. Zoom in to check the edges.
Remove the green spill – Create a new layer above the cutout, set its blend mode to “Color”, and Alt-click (Option-click) between the layers to clip it. Sample a color from the subject’s skin or clothing and paint over the green-tinted edges to neutralize the spill.
Add your new background – Place your replacement background image below the subject layer (drag it under the cutout layer). Resize and position it as needed.
Adjust the subject – If the subject looks too dark or too light against the new background, add a Curves or Levels adjustment layer clipped to the subject layer. Match the lighting direction and color temperature for a natural look.
Save your work – Save as a PSD to keep layers, then export as PNG or JPEG for final use.

Common Mistakes

Skipping the mask refinement – leaving a hard, jagged edge that looks cut out.
Not removing green spill – the subject’s hair and shoulders retain a green tint.
Using a low-resolution background – it looks blurry or pixelated behind a sharp subject.
Forgetting to match lighting – a bright subject on a dark background looks fake.

Tips

Shoot with even lighting on the green screen to avoid shadows and hotspots.
Use the Color Range method (Select > Color Range) if the background has varying shades – it samples a color range rather than relying on edge detection.
For fine hair, use the Refine Edge brush with the “Decontaminate Colors” option to remove fringe.
Add a slight blur to the background to mimic depth of field and make the composite more realistic.

Troubleshooting

Green edges remain – Use the “Defringe” option (Layer > Matting > Defringe) or manually paint with a desaturated green color on the mask.
Subject has transparent holes – Check the mask for black spots inside the subject; paint them white with a brush.
Selection includes background – If Select Subject selects too much, use the Lasso tool to subtract from the selection before refining.
Color Range selects too much or too little – Adjust the Fuzziness slider; lower values select only the exact color, higher values include similar shades.

Frequently Asked Questions

What is the fastest way to chroma key in Photoshop?

Use Select Subject, then refine the mask. It’s quick for simple subjects, but may need manual cleanup for hair.

Can I use a blue screen instead of green?

Yes. The process is the same; just sample the blue color instead. Blue works better if the subject has green clothing.

How do I remove green spill from hair?

Use the Color Range method to select the green, then create a hue/saturation adjustment layer and reduce the green saturation only.

Why does my cutout have a white fringe?

That’s often from a too-tight selection. Use Select & Mask with a slight feather (1-2 px) and shift the edge inward a bit.

Can I do chroma key in Photoshop Elements?

Yes, but the tools differ. Use the Magic Extractor or the Quick Selection tool, then refine edges manually.

Do I need a green screen to use chroma key?

No, you can use any solid color that contrasts with the subject, but green and blue are standard because they’re least common in skin tones.

Sources: Adobe Support. Menus and buttons can differ slightly by version. Spotted something out of date? Tell us.