Hi
I have to renovate the kids' bathroom. I don't want it to look too childish. I want to have clean and modern loook.

This tile on the floor. (kimono silk..color not really decided)

I was originally thinking of doing the same tile on the bathtub walls..but maybe too boring?

Can you recommend me any tiles that can go well with this flooring? The vanity is dark brown with white top..tile will only surround the bath tub. Wall colors will be decided last..Thank you!! Please help me!!