Hello and Welcome One way to coordinate colors between rooms is to ensure that they have a similar or the same undertone, and then make sure that they have the same LRV. I can't tell from my monitor what the undertone of the weekend getaway is, maybe yellow? If so, you can look at colors with a yellow undertone to coordinate with weekend getaway. This is just my take, I'm sure lots of the folks on this forum have other ways of choosing a coordinating color! Some people seem to have a knack for it! It's a beautiful color! Here is a link that might be useful: More info about LRV

I think the bathroom needs serious work to make it a nice space . The floor and the tile do not work together , the whole space is huge for no reason, the cabinets are the only thing worth keeping. I would save my money to renovate that space for sure. As for bedroom color I usuallt start with the bedding , a feature wall works best when it is on a wall with no doors or windows. I think the window in your master is too small, the wall color and the carpet don’t work together so maybe post a pic of the bedding you love and I hope you are not going to bring all those pieces into your new bedroom from the spare one.Also your ide books are all over the place, seriuosly sit down before doing anything and figure what style you really like. These spaces could be fabulous but they will require money and a good designer,

SW reflection for bedroom (light grey blue) and sw ice cube for bathroom (white grey/blue). It will brighten up both of the rooms.

I can see a light tan/cream or "greige" in there, which are neutral enough to take through all the spaces but not boring. We did that on a friend's recommendation and it made the rooms look larger and brighter and more cohesive. Large artwork or wall papering a wall can add interest here and there. Or going one shade darker in the bedroom. Something like that. However, test some colors! It appears you have warm wood floors so finding a neutral that doesn't clash means test painting some sections of wall with a few colors first (near the floor), and standing back to compare them against the floor as light changes throughout the day. Neutrals can really change as the light changes. I just finished painting kitchen cabinets and it took me forever to settle on a color but having a few samples helped. I was able to eliminate a couple right away that looked great on the strip and not so great with the backsplash and counters in my kitchen. BTW: I also have paneling in my bathroom. After seeing a photo in a magazine of bead board painted in "minimal contrast" with the walls, I painted the paneling in very pale yellow, put bright white on the trim between, and painted the upper walls in a cream color (an even lighter version of the yellow). That "slight contrast" worked great and I love it now. The paneling is not overwhelming but the architectural elements are still evident. It might be the contrast you don't like. Just a thought. Good luck! It will look great, I am sure!