I don't think the warmth is coming from the thinset as when I look at the thinset in the container, it looks like pure white and not tan.
I am leaning towards choosing the French Linen now because then it won't be trying to blend all these different white colors.
Below is actually Foggy Morning, but it's similar to French Linen. It was on my list when I was looking at samples, but the white subway tile concept and idea was something I was being stubborn about.
Q
Archer
Q