I don’t normally like to comment on posts in the WicDiv tag - we want people to be able to discuss the book without us interfering - but I wanted to address something that has been raised this week.
Skin tone appearance, as with all other colours, changes under different lighting. Matt is extremely good at colouring lighting - he can change the whole mood of a scene with it. This means that skin will look lighter or darker or warmer or cooler depending on that. Some examples of how the lighting affects skin below