Hello, I'm using character Creator 3 pipeline and anytime I create someone their hair color comes out red and green, not browns.  I'm sure its a easy fix, I just don't know how. Thanks.

Converting to a different shader type and then back to the Digital Human shader will take care of this. See here:
https://manual.reallusion.com/Character_Creator_3/ENU/3/Content/Character_Creator_3/3.2/15_Digital_Human_Shader/Converting_to_Digital_Human_Shader.htm