Hello,
This floor is a natural stone tile, grey green slate. The homeowner actually put this in themselves : ) They cut the larger squares into smaller squares and rectangles to create this beautiful patterning. The stone naturally varies in color and tone, which really adds to the overall look. I went online to see if I could find the color of slate that they used, she doesn't remember what the name of it was. I did find a website that had very nice colors, that are a little more unusual, www.americanslate.com. The Dolphin Fin is the best match that I could find. I hope that this helps. Thank you so much for asking! - Angela

Dolphin Fin is the color on the left.

Thank you so much!