Hello the stone is Bluestone which varies between greys and blues in color. Have a great day!

The bluestone pavers are beautiful! I was asking about the pool though like the inside color of the pool to make it that blue color? I am asking because we are using similar bluestone pavers and pool but the pool colors have not need decided yet. I like how these go together. We are in Pennsylvania otherwise we would be working with you Thanks

Thank you for clarifying! The material inside of the pool is called Pebbletec. I am not sure which color, but I know they have a very large color pallette on their website. Take a look! Hope this helps. https://www.pebbletec.com/