I am torn. So, I sent both choices to Mike and hopefully he'll just surprise me. The first is "Ardesia Blue", it would be grouted with a grout called "Delorian Grey".
The other is called "Rovigo Gavello" and it would be grouted with a sable brown grout. After watching Dan scrub the once white kitchen floor grout repeatedly at 2 Locust (while uttering a steady stream of expletives), I think no kitchen should ever have white grout on the floor. Unless of course you do not have kids, pets, guests, food or beverages in your kitchen.... in which case- by all means: go for white.