Color Key Node

The Color Key node is used for chroma keying—removing parts of an image based on color. It is commonly used to remove backgrounds like green screens or blue screens from footage, creating a matte where selected colors become transparent.

Inputs

Image

Standard color input.

Key Color

The target color to be keyed out (made transparent). This is typically the background color, such as pure green or blue.

Hue

The tolerance for hue difference from the key color. A wider range will key out more colors with similar hues.

Saturation

The tolerance for saturation difference from the key color. Helps avoid removing unintended desaturated areas like skin tones or clothing.

Value

The tolerance for brightness difference from the key color. Useful when lighting is uneven or background luminance varies.

Properties

This node has no properties.

Outputs

Image

Image with its alpha channel adjusted for the keyed selection.

Matte

A black-and-white alpha mask of the key.