My bad, I was thinking of the old numbers before Highmountain got more than 1 eye color 
and Blizz kinda makes it a competition for scraps when they trickle minimal updates to the sparsest race and do nothing to the 2nd sparsest race. It feels bad all around. We’re all squabbling for crumbs. I mean look at some of the gameplay vs cosmetics comments. This ship is being scuttled and there aren’t enough life vests to go around.
Since Night Elves are the parent race for Nightborne, NB could have inherited their eye colors just like Highmountain copied vanilla Tauren eye colors—minimal effort that would have aDdEd A tOn Of CoMbInAtIoNs. Crumbs.
Another simple change that would have easily padded the numbers is if they had added at least 2 tattoo colors for NB. Keeping the metallic theme: gold, copper, or rosegold.
Lightforged are tied with only 6 classes.