This paint is called 'grey' but it is actually white. Put next to pro acryl bold titanium white it is extremely difficult for me to tell the difference. AP has a separate 'matt white' paint, but honestly I doubt I'd be able to tell which was which, this is White Enough.
I do appreciate that unlike Citadel's whites, this one actually has decent color coverage instead of being basically translucent. Also unlike Citadel white, this does not dry chalky if you leave it alone on your palette for more than sixty seconds.