Lighting is everything when you go dark! You want to lean into "layered lighting"think warm floor lamps, brass sconces, and maybe some LED strip lighting behind a headboard. The dark backdrop makes light sources pop brilliantly. I found that a matte finish absorbs harsh glare but looks incredible under the soft glow of a warm bulb. It creates this "hotel lounge" vibe that is impossible to get with white walls. You can find some stunning examples of high-contrast, deep-base designs to test with your lighting here https://costacover.com/collections/moody-wallpaper