We are in the final stages of the pool build. The glass tile went up yesterday on our fountain and is supposed to be grouted this morning. The mason is suggesting a white grout for this Hisch Glass tile (silhouette xcm230) and we aren't sure. The tile from afar doesn't sparkle or really look great like it does up close. Please recommend a grout color? We seemed to forget about this important detail and now I'm worried that this tile isn't looking good on the wall. Hopefully the grout will help.