First do not do the herringbone in the niche in fact don’t do the niche at all IMO they get skuzzy , there is no reason to want to highlight a bunch of shampoo bottles and if you are going to have a leak this is one of the weak spots in a shower. If you must do it then that herringbone needs to be somehwere else in the bathroom. As for wall color I like watery colors in bathrooms. Like these types of color. I really like the Harbour Haze .

Okay...it was unclear...both rooms are this color?...so you are changing both ?....but are doing the bath first?....i always suggest you look at HOUZZ photos...type in “light blue coastal baths with stone “ or your description of what you want...to get ideas to start...

I would choose a very light version of the lovely blue/green color that is in your wall tile. Very pale, just to add a hint of color to your walls. If the color leans to the green side, you might look at BM Sea Salt. If towards the blue, BM Silver Cloud.

Hi there, I purchased this bathroom vanity in silver gray. https://www.wayfair.com/home-improvement/pdp/three-posts-currahee-60-double-bathroom-vanity-set-w009037182.html?piid=2147339589 I am painting a small, north west facing bathroom with a whitish marble-look vinyl tiled floor. I am trying to find a paint color for the walls that will not look horrible with the vanity. I am kind of wishing I had bought the other offered vanity color that is a simpler gray. I went to Home Depot and had them do a color match from the vanity. I have the paint sample and all the codes on it, but I can't seem to figure out how to find an actual named paint color that would be similar to my custom color. If I did that, I could know what type of color it is and choose a light color for the walls that would match. I am trying to choose a light blue/green/gray color, but I have held up a couple next to the vanity and it doesn't look great.