We are having a fountain built and discussed tile with the builder, the TW and builder said blue is the best color. I said that even with white the water can be blue. I got a lot of flack on that one.
Went to see Pachi today about getting tile, and made the same comment, everyone thought I was crazy (more than normal).
I had a pool in the US, it was white fiberglass, and the water when clean was blue.
From Wiki:
Clean water appears blue in white-tiled swimming pools as well as in indoor pools where there is no blue sky to be reflected. The deeper the pool, the bluer the waterhttps://en.wikipedia.org/wiki/Color_of_waterHowever, with only a foot or so of water in the fountain, the blue would not be noticable, so I agreed to color tile.
Just thought I would provide that info as no one has agreed with me yet.