Audio Effect: Saturation or Brightness of existing colors

[XVII]

Feature request

All of the audio effects currently rely on a predefined set of colors.
It would be neat to have the colors match the existing LED colors of the picture.

This would basically mean that the effect is just overriding/tweaking brightness (or saturation?) on peaks.

What problem does this feature solve?

Additional Audio Effect Visualisation

What does the proposed API look like?

I'm not sure if effects can manipulate the colours at the end of the processing "pipeline".
They would almost be more of a "filter" than an "generator".

How should this be implemented in your opinion?

Music: Fullscreen pulse (Brightness)
Music: Fullscreen pulse (Saturation)

Are you willing to work on this yourself?

Happy to test!