In this tutorial you learn how to link many color properties to a slider such that they can all be changed at once. As an example, we control the hair color, skin color, eye color etc. of a character by linking them all to a slider. You just need to specify for each color property which color it should have for the minimum and the maximum value of the slider. When the slider is moved, the colors then blend between these two extreme values.
We use the Linear Link Color iExpression for this, such that we don't need to write any expressions code and instead do everything using a very intuitive user interface.