FWIW,I've been hanging wallpaper for more than 30 years. Most of the hundreds of rooms I've done, have had latex paint. I have never encountered any problem that I would have connected to the latex paint. Actually the only time I've ever had a problem with the paint under the paper, was in one house. I thoroughly sealed the walls of three rooms in that house before I papered. A few months later, the paper started popping off of the walls, taking the sealer and original paint with it. I have never seen anything like it. After considerable research, I concluded that the original coat of paint was probably applied to new walls while they were covered with dust. This would not be surprising since most builders spray on the original paint. I suppose it's possible the paint itself was defective or so cheap as to be useless. I'd love to hear more about the article that claims latex can cause a problem. I've never heard that before.

That's a perfect example of the problem with trying to judge colors on a computer monitor--there are no standards. Exposure, white balance, gamma, display color temperature, etc. The only way to match is in person.

IMO dark green would be my last choice of paint color in that space.Sorry I need to know what you want this space to be like when done. Those cabinets are screaming dated and way too dark. IMO if you want some green in the space do thecabinets a nice pale green and the walls a warm white BTW hanging wall paper does not work well on painted panelling and there is IMO no place for wallpaper in this space. Are you changing flooring ? I think we need a lot more info BTW all the lighting needs to be changed to LEDs 4000K before choosing anything .IMO you needed to have adesigner from the beginning and is that a TV on the staircase wall? IMO the whole point of idea books is to give a glimpse into your style and not one of yours is anything like what you are planning. BTW painted stone is never a good look and that FP is the best part of the space .

I’m thinking three dark walls. This is B.M. Nocturnal Gray, but just a guess to colors in the paper. You do need some blue undertone to work with what I call the “mean” west light. My go to for west light is Patriotic White, so I moved down the strip to find something darker. This color would show great with the white crib, and you could add a white rug on the floor, and a white lamp on the dresser.