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dynamically make the skin on a character to blush or become pale?

Is there a way to dynamically make the skin on a character to blush or become pale?

As part of my CogSci research, I have made a scene where the user has to interact with a virtual avatar that has facial expressions, and I would like to add blushing and other nonverbal cues.
I’m not very knowledgeable when it comes to material, but I figured that someone in this awesome community might point in the right direction.

How would you go about it?
Thank you in advance!

  1. Define blush area on the character (texture mask is a good way to do this)
  2. Set up blending material that lerps between default skin color and rosy tint with parameter
  3. Animate parameter, usually as a UE4-defined curve in Persona. Set up character in Anim BP to use dynamic material instance and update when blushing.

If this is your first time doing something like this, I suggest you break down the steps and learn them piece-by-piece.