Thanks Kim, i've been seeing photos of grey/darker colors. It is probably better to try to stay away if possible LOL.
For the spa, I am looking to do all 4 top sides in glass, and all 4 sides in glass as well, I think it will look nice, a bit worried about some of the glass that won't be submerged in the water though. The pool waterline will be the same, I am thinking all 1x1 glass tile, instead of going with 1x1 glass on spa and 1x2 on pool water line, but might be a nice change up also. Honestly don't know!
I'll continue my research for now.