Hi Abby! We're not sure which grout was used on this job, but some good/similar suggestions would be Tec Dove Gray, Tec DeLorean Gray, or Tec Light Pewter. You could visit either Virginia Tile or Beaver Tile's sites; there is a tile that’s hand tossed 2x8 from Olympia tile white finish that can be found at Beaver Tile, the grout can be purchased there too. Hope this helps!
KSI Kitchen & Bath
Abby Merchant
KSI Kitchen & Bath
ciaoginag