A color mask only depends on pixel colors and can be configured to perform either color keying or color selection based on the RGBA channels.
The color selector function can be changed to many different function types such as Keyframe FunctionDefine a function using keyframesRead More or Color Tone Balance:
You can also do some chroma key using presets, or by turning the color selector type parameter from "channel" to "key" in order to select a specific color for this mask.
In this case, feather" and tolerance are the only parameters you can act on.
-tolerance : distance of the color range from the one you picked up.
-feather : Smoothness of this range.
This modifier has a 3D equivalent : ColorVertices are selected depending on their colorRead More.
here is a small tutorial to do chroma key with this modifier:
Color Map (2D Generator Selector) : This optional parameter enables to extract colors from another 2D GeneratorThe part of a 2D layer that generates the imageRead More than the current one, such as a shared pre-composition
Standard Presets: Chroma Key, Chroma Key - Sky, Chroma Key - Green Screen, Chroma Key - Blue Screen, Chroma Key - Black and Chroma Key - White