Before it is grouted, revisit your design. Consider using the Moroccan on the wall by the shower area.

As for the free standing tub, use the floor tile, maybe in a smaller cut, and definitely not a vertical install.

I’d match the grout to the background color. That would allow you to focus on the design on the tile, rather than accenting the shape of the tile.

That photo is very helpful!

Judianna20, the tub is 5’ long, but these tiles will also have a border added. My floor is travertine and everything in the room is quite neutral. The tile by the tub is meant as a feature.
Thing element in the shower that relates back to the feature is that the floor and back of shower niche will be a charcoal basalt herringbone mosaic tole. The wall at the far end of the room near the shower is destined for a handy towel bar.