Upper bath colors and finishes

We've worked some more on cabinet ideas and come up with two these ideas with more symmetry, and which should let us get Ready-To-Assemble (RTA) cabinets that are CARB Certified, meaning they meet California Air Regulation Board standards for air quality (that is, low formaldehyde emissions) if we don't go with something more expensive or custom.

With this one we might put a glass shelf underneath the cabinets:

In the image below, I do like the practicality of shelves here but not so much the look of them. However, I think the bottom cabinet-heavy configuration is what we will probably choose since we don't really use the few drawers we currently have and probably won't not until the kids get a lot older. I want things out of reach of little hands!

Here is what we have on colors and finishes:

-vanity is (probably) natural maple or possibly bamboo

-counter is white quartz or maybe recycled IceStone (also white but with some small flecks)

-two sides of shower are white acrylic and door is glass

-back wall of shower (opposite the mirror) is green iridescent Sonoma jade glass tile 1x4"

-backsplash under mirror is same green iridescent tile

-floors are white linen Daltile Fabrique (w/grey streaks)

Here is the Fabrique with the Sonoma on top (we're choosing the one in the lower right corner).

So what do we do on paint color for the bathroom? Super pale grey or grey-green? Or just white? Or something else?

And how do we trim that funny L-shaped wall next to the shower? (No, it's not really going to be a gate; either the software program is too dumb to let us put in a half wall in front of the toilet, or we are!)

And how do we trim the window wall? Both that wall and especially the half wall will be seen from the front door!

This bathroom will feel more contemporary and light than other parts of the earthier more craftsman-inspired (but-still-a-Cape!) home, but I don't want it to seem like it's from another universe.

We thought the half-wall might be topped with a piece of the counter material, or maybe of matching maple. But do we do a wainscoting of some sort halfway up that wall? In what material? Or maybe not up that L wall next to the shower but yes on the back window wall? We could continue the Fabrique from the floor halfway up the wall and top with some of the jade, continuing the line at the level of the backsplash.

A designer friend said she didn't think so much Fabrique would look good continuing from floor to wall. I wonder if a wall will look naked just painted, assuming we're not using any kind of statement color.

The Sonoma jade doesn't come in any trim pieces -- just different sizes and and also in Silk finish, their matte finish). Not sure about the availability of Fabrique in trim pieces or anything other than 12x12"

Baby is up from nap so here goes the post!