The face tex is from a earthguard, you will have to play around with the color codes to make the face and skin colour match as much as possible - it will never be exactly the same though.
Same face and body color code will look nothing alike sadly.
Tideborns have this purpletone mixed in by default. What i mean is: set a earthguard skin to pure white and it will be pretty much white, set a tides skin to pure white and it will kinda look light purple