You mentioned sconces, so I'll warn you to rough in any electrical adaptations required for that before you put in any finalized wall treatments. It is hard enough to run electrical as it is; doing it in finished work without destroying it is nearly impossible.
The MTS link you posted was actually one I'd run across in my search; I rejected it for two reasons. One, MTS does have "cobalt" listed as the colour for some other tiles, so I'm not sure this would really match (though I do love the variations). Two, and more importantly, their 1" nominal size is a "diameter", which ought to mean point-to-point, which is confirmed by the fact that the 168 tiles per sheet make up .94 sf. A 1" side-to-side tile would be about 125 tiles per sf. So I think this is basically the same as the loose hex tiles I ordered.
A great layout, if I do say so myself. As far as cobalt blue, I had an entire shower tiled in cobalt and even though it is more of a spare bathroom and a bit cramped, it's my favorite place to shower. I feel like I am in Greece!
I think your design sounds great!
A note on toilets: trying to retrofit an older toilet to reduce it's water usage is not a good idea. A lot of engineering goes into toilets to get them to flush effectively with lower volumes of water.
Also when you rough in your wall sconces you want to know exactly what sconce you're putting in and if you're going to mount them bulb/shade up or down.
The center of the bulb should be approximately eye level, or a good average for multiple users, to give you the best lighting for using the mirror.
Thanks for sharing your project!
PS-your bot blocker wanted me to enter "three hundred and fifty four" which would be 300.54 but it was looking for 354 (three hundred fifty-four)
Is that part of the human test? :-)
It was intriguing to read that you thought the crown jewel of the bathroom would be the toilet. I lover the fact that you are keeping your clawfoot tub as they give an elegant touch to any bathroom. But I think that would be the most exciting part of your design!
Your bathroom tile plan is very similar to what I want to do. Thanks so much for the pointers to cobalt tiles. I would love to hear how it all turned out, especially the cobalt hex for the floor. I too need to track some down, though my preference would be 3/4" hex. I know the tile lines may have changed since your project, but maybe . . . Please post an update!