All of these are cork samples (the real tiles will be 12"x12"). At first I loved the ones on the far left because they'd bring warmth - the off white tile is a similar tone to the floor that's there now, and the other tile is a really dark brown instead of black so it'll also add warmth. But then more samples came in and now I'm leaning towards the 2 options in the middle.
I know its hard to tell in the photo, but the one on the left is an off white and a true black. The one on the right is a true white and a dark brown that reads as black. I paired them like I did so each option had some warmth (either from the off white or the brown instead of black). I can see the benefit in each - the white will look crisp and clean, but the off white will look warmer and won't show dirt as easily.
Thoughts? Like I said, I not in the position to buy tiles tomorrow or anything, but I want to be confident in my choice by the time I am able to put the money down.