I'm not an expert but when choosing paint colors, I prefer contrast. I would get a few samples and paint some spots on the wall to see what works the best with your tile. If the tile leans more towards white I think a soft sage color would be pretty with the elements you've described, but if your tile leans towards a brown, it's hard to say. If you can post pictures, it would really help.

BM October Mist might work in LR BM Wind's Breath may work in Bath Paint LR all 1 color or paint the top the same color as the trim

I checked out accesible beige and it doesnt work well with my blue pearl granite. I now thinking alabaster. My trim and ceiling are alabaster so it may have to be this color.

On colors, I think SW bagel might be a little rich and warm. I think a very low saturated sage or cream would work. Perhaps even a lighter version of the same hue you have now. Since you'll likely be taking things down to paint are you doing something with the medicine cabinet? Do you have enough storage w/o it? Would be good to see vanity as well. BTW, that tile doesn't bother me unless there is something we can't see in the photos.