I LOVE your yard and house! Those doors leading out to the pool are purrfect!
With that pretty BLING tile you need to think what color of mortar you want them to use. It will change how the clear tiles look. Then you get to think about what color grout to use. If you use white it will make each tile pop. If you use gray it will blend them in together. See if you can get your hands on grout color sticks to see which color you like the best. I am leaning towards a med gray for this tile.
Now a word of caution on that dark plaster. IF it is done right it will be oh so pretty BUT (bet you saw that coming) if it is not done perfect it can mottle. Here is a link to some reading for you to do to learn how to get the best plaster job on your pool: