The stone dust on the surface of the pool is gray. Depending on the sun, it can look anywhere from this blue to a deeper blue gray. It doesn't ever look green, though.

I don't understand what 'stone dust on the surface of the pool' is, but the pool is a lovely blue. Can you tell me the manufacturer/colour of the finish ?

The stone dust is a medium gray that looks blue when the water is put in. Comes in many shades.

Thanks. I cannot find any gray pools in the Naples area. Can you tell me if the finish color that pool companies identify as French Gray is a medium gray? When I wet the Hydrazzo French Gray sample, it turns quite dark and I'm nervous about being able to see the bottom of the pool easily with small children around.