Here is a comment my wife posted about Aqua Blue vs. Blue Granite for our pool:

"Wife of Spaceman here... thought I should give my input since this was a bit of a torturous decision for me and I'm the the one who actually saw all three of these colors. All were goregous, I really don't think that you can go wrong with this product. I also saw a Tahoe Blue Pebbletec, didn't notice much of a difference between sheen and tec, I thought that there would be big difference. White Diamonds was in a contempory style pool, fit that style perfectly, it's light, shows a tad bit of green (I was told that most of the lighter colors do) very unique looking. The Aqua Blue that I saw was also in a contempory style of pool with glass tile. It was beautiful, it is "knock your socks off" blue. The water color went perfectly with the glass tile style. Windex in the depths is pretty acurate. Gorgeous color, but I walked away from it wondering if it would work with my very natural looking pool. It's almost an unreal blue (unless you've seen the Mediterranean) The pool I saw had a deep end 9 or 11 ft. and the Aqua Blue looked very blue in the depths (no problem at all seeing to the bottom). A significant part of our pool is deep 7-8ft, so this left me on the fence. By the way no grey at all with Aqua Blue it's blue even on the steps. Even though several of you have commented that Blue Granite would be perfect for our pool I wasn't convinced. From the pictures I'd seen, it seemed a little dark for me. I saw Blue Granite last out of all these colors, had the most preconceived ideas about it, was expecting not to like it and I ended up loving it!! It is very exotic looking, blue with a hint of grey (which doesn't bother me a bit). I just couldn't look at it enough and didn't have any reservations about it at all. We saw it with a natural looking rock slide (somewhat similar to ours) and it worked perfectly! I look forward to sitting by the side of my pool and staring at it all day long! Can't wait to see it finished!"

I also have a link to out Pool pics if you're interested.

Here is a link that might be useful: New Pool build in South Houston

We are using Aqua Blue Pebble sheen. Not installed yet, but I love the color. It is a vibrant bright blue....can look like windex in the bright sun, but since we are doing a formal pool/roman style, we wanted BLUE. Blue Granite ws my second choice. I have seen both in person and the Aqua blue is brighter with no green or gray. Blue Granite is a tad bit darker blue with a tiny hint of gray....still beautiful. When I say darker, I don't mean dark dark......just a shade darker. I searched google and got a lot of images from there as well.
HTH......its a tough decision.

Yes, it WAS a tough decision between Aqua Blue and Blue Granite. They're both great colors. Be sure to go look at installed pools with both finishes before you decide! We finally went with Aqua Blue...our pool is formal and contemporary.