First make sure the lighting is LED 4000K or whites will always appear yellow and the gray will not have the same look either. I would just use the same color as the trim to avoid a head ache.Do a nice semi gloss on the trim and a matte on the walls then add color with towels accessories they are easy to change whenever you want to.

@Patricia Colwell Consulting The vanity lights are two sconces that will hang horizontally over the mirror. Each sconce has two 60W incandescent bulbs or LED equivalent. That only comes out to LED 3200. I'll also have a light over the shower and a Whisper exhaust with a light over the toilet (both on the same switch). And a small pendant over the tub (separate switch). Before pic and sconce pic below. Thank you.

Is that enough light?