A house we are considering as open tiled showers similar to this. The tile is brown (not gray) and it (thankfully) has no window right there at the shower! I love the idea of an open tiled shower! No glass to keep clean, no curtain driving you crazy!
I love turquoise :) Blue glass subway with white surrounding. The issue if you don't like glass with any turquoise is that most blue glass tiles have that color in them. So we will have to order samples to make sure you like the color.