Hi. In this case we matched the grout color as closely as possible to the tile color. This grout is Laticrete Dusty Gray.
JenniLeasiaDesign.com

Thank you do much. I stumbled upon this pic yesterday and it is surprisingly close to what we are having done in our kitchen right now. The same cabinets and very similar floor and set if three windows (but mine are a bit smaller :-( ). The only things I hadn't fully decided on yet were the tile & counters. If you don't mind, I'd like to ask you a design/opinion question... If we were to do a similar tile, how would you handle a pot filler over the stove? You you accent it in anyway or just leave the surrounding tile as you currently have it?
Thank you!

Thank you so much!

What color are the tiles and where could I find them?

I am doing a kitchen similar to this, but I'm having a difficult time finding the color used on the backsplash. I was hoping to find out where I could purchase these tiles and the color you used.
Thank you.

Hi Sandy, we carry a few colors that are similar at http://www.subwaytileoutlet.com/categories/Blue-Glass-Subway-Tile/
I would get a sample of 'Glacier' 'Ocean' 'Sky' and 'Vapor' and put them in your space. A lot of times you will find that with glass tile the color hues will change with the amount of lighting and surrounding colors. Glass tile is so reflective that the same color can look totally different in two different rooms. If you need any help, please don't hesitate to contact us.

Jenni Leasa, I also have design question for you if you don't mind. I am building and my kitchen layout is identical to this (even the large window behind the sink). The only thing different is my island and i am using white subway tiles.
I have recently been debating between keeping upper cabinets to the right of the stove just as yours are in this photo, or adding a horizontal window higher up the wall and installing a set of three floating cabinets underneath the window. If I did this, I would also extend the Subway tile to the ceiling and add cabinets to the ceiling on the left. In you professional opinion, would this change/addition look good or would it be too unbalanced and awkward?

keep it symmetric

Please tell us about the cabinets. Custom made? Are they semi custom? If so, what company manufactures them?
TIA