Without a photo just based on what you said, it sounds like you don't like the beams themselves. If this is the case, paint them to match the ceiling as that will make them the least noticeable. If you paint them any color other than the ceiling they will stand out so do that only if you want the beams to be a feature.

The first picture is the room before I did anything. It's hard to tell by the picture, but the walls had multi color thin stripes. The second picture is the work in progress. The firring strips and chair-rail have been removed, the walls are textured but not painted yet, the fireplace wall has been primed but not textured yet, and the ugly mirror over the fireplace has been removed. Nothing has been done to the door trim yet. You can see the peeling paper on the beams. Whatever is peeling will be removed and sanded before priming. The first color, vanilla tan, is what the walls will be painted. The second color, canyon clay, is what the wall over the fireplace will be painted. The trim will be white, and the ceiling will be similar to what it is now, ceiling white, unless someone suggests something better. I'm horrible at choosing the right colors!

Bathrooms can often be very different from the rest of the house so I see no problem

@alecforshort The "ceiling" and the inside of the beam should stay the same as the kitchen because it is actually part of the kitchen. You could case the opening as you would other doors and windows. There is another solution to consider. Use trim to frame off a rectangle on the gallery wall, leaving a perimeter of white around the top and sides and bottom. Paint the inside of the rectangle your accent color, it makes everything inside the frame seem special.