Chroma Key in Photoshop and Remove Green Spill from Hair
After keying out a green background, fine hair often retains a green tint because it picks up the background color. This quick method neutralizes that spill without damaging a good mask. You’ll target greens with Hue/Saturation, confine the effect to the subject, and paint the mask to affect only fringed areas.
Step-by-step instructions
Target the green spill with Hue/Saturation
Create an adjustment: Layer → New Adjustment Layer → Hue/Saturation.
In the Hue/Saturation panel, open the dropdown and choose Greens.
Max out Hue and Saturation (drag both to the right) to visualize the exact color range being affected.
Adjust the Range sliders (and their feather handles) so only the green fringe is included—avoid yellows (hair color).
Reset Hue and Saturation to 0, then adjust Hue until the fringe matches the natural hair tone; fine-tune Saturation/Lightness as needed.
Confine the adjustment to the subject only
Place the Hue/Saturation layer directly above the cut-out subject layer.
Alt/Option-click between the Hue/Saturation layer and the subject layer to create a clipping mask (or Layer → Create Clipping Mask).
Verify the effect no longer influences the background layer.
Localize the fix if it affects green items inside the subject
Select the Hue/Saturation layer mask thumbnail.
Invert the mask (Ctrl/Cmd+I) to hide the effect globally.
Select the Brush tool (B), set Foreground color to white, choose a soft brush, and paint only over hair edges showing green spill to reveal the correction.
Adjust brush size/opacity as needed; you don’t need to be pixel-perfect.
Test against different backgrounds
Swap or toggle background colors (e.g., red, blue, yellow, green) to ensure the clipped adjustment remains confined to the subject.
If needed, return to the Hue/Saturation range sliders to narrow the affected greens further.
