I like the sterling silver. It blends better....that being said, if you like more of a contrast, or want to see the lines, go with smoke grey.

Yes, grout decision for floor and shower walls should be made together. If contrasting grout, even if grout line is thin, it will make your individual tiles show up, and if grout matches tile it gives the impression of a giant slab of stone - which is a high end look to me.

None of that is dark enough. Natural Gray if you go that grout. But, I’d pick a polyurethane grout like TEC PowerGrout or acrylic grout like Flexcolor CQ. They never need sealing.

Smoked Grey will definitely show more of a contract between your tile and grouting .

I think this would be your best choice.

I like the Sterling Silver. It blends really well so you won't have grout lines breaking up the floor, which will in turn make the space seem larger.

Thanks for your suggestions. sounds like it I prob can't go wrong with either. I've decided on the Smoke Grey for the bathroom and shower floors, and Silver Shadow for the white shower wall tiles. fingers crossed that it all looks good afterward since it's so permanent! This is a stressful process for me!

How did this turn out? I’m considering the exact same grout colors for my walls and floor as well.

-AB

Oh gosh, i apologize i didn't see this a year ago. My grout colors came out fabulous. I've been very happy with the decisions i made! I hope you ended up happy as well.