Get outta town - first mosaic?????????!!!!!!!!! Looks like a professional job to me. Multiple colors w/probably be wonderful, if you want to put that much work into it. As for my style, I used different shades of grey. I mix Pearl Grey (from Lowes Mapie brand) for a very nice light grey, or mix in a little black to make varying shades of charcoal. It is a nice background and shows up the glass rather than the grout. Any color you use on this wonderful project w/be gorgeous. That is some kind of mosaicing for a beginner. Congratulations.

WOW..........if that's your 1st and is soooooo fantastic I can hardly wait to see what you do next!!! It is just beautiful.

Please do not even cosider black. that would ruin it.
One light sand color as someone suggested and thn colorwash your blues, browns, etc,
Beautiful first mosaic. Good luck

Well, I could swear that I answered this post several days ago. My answer's gone. Here goes again. That mosaic is wonderful! I can't believe it's your first one!! I use a pale pale brown on just about everything. It's a sand color. I am never please when I grout something white, and while I usually like black, in this case, I don't think it's a good idea. Please come back and post a pic.