I would go for a deeper blue.

Sea salt is so charming and I think will be a winner but that blue range is nice too!!

I don’t think Sea Salt will blend well with the oak cabinet...

My husband wants something brighter, looking at SW Dewy and SW Glimmer now.....

Make some sample boards because lighter colors tend to look dull rather than bright in low light rooms. (Also, to Amanda's point Sea Salt works great with wood tones FYI)

Here’s a blue in the attached photo that would work with your oak cabinet. It has a beachy feel.

I like those chairs! is that a lagoon blue?

Here’s a close color. It might be fun in a kids’ bathroo. I would try a small sample first.

Sea salt would be good. You already wall art and towel with the same color! :-))

Here is with Blue lagoon

Ohhhhhhhh boy! :-((

Here is Sage SW

Try SW Rainwashed.

Taupe would work good with floor, cabinet and tile.

Thanks celerygirl. I’m really liking SW Sage...

Take a look at SW Blue Iris. Its a gorgeous color. Sea salt is lighter, but very pretty and it does go with your oak cabinets, however a bit brighter color would go much better. https://www.lowes.com/pd/HGTV-HOME-by-Sherwin-Williams-Blue-Iris-Interior-Eggshell-Paint-Sample-Actual-Net-Contents-31-fl-oz/50388208

I have a guest bath with no natural light and used SW Rainwashed. It's pretty in the low light and not too bright.

Sea Salt Blue looks great. You really don't want anything darker. You liked it...just go with it.

Sea Salt looks very good in the mock-up of your bathroom, IMO.