# Saturation

Increases or decreases the saturation of an image. Saturation is calculated relative to a standard luminance measure using the RGB coefficients 0.2126, 0.7152, 0.0722.

## user

Container for user-defined plugs. Nodes should never make their own plugs here, so users are free to do as they wish.

## out

The output image generated by this node.

## enabled

Turns the node on and off.

The input image

## channels

The names of the channels to process. Names should be separated by spaces and can use Gaffer’s standard wildcards.

## processUnpremultiplied

Unpremultiplies data before processing, and premultiply again after processing. This allows accurate processing of nodes that deal with color, when running on partially transparent or deep images.

## saturation

Values less than 1 bring colors closer to monochrome, values greater than 1 push colors away from monochrome.