There is a quiet drama in charcoal that I keep coming back to. Ember Charcoal leads this scheme as a deep, slightly warm near-black that feels more like cooled coal than cold stone, with Smoked Graphite stepping in a shade lighter so the dark planes have movement instead of one flat wall.
The warm greys are what keep it from going gloomy. Warm Ash and Pale Stone carry a faint sandy undertone, so they soften the charcoal and bounce a little daylight back into the room rather than swallowing it.
Then comes the spark. Ember Glow is a burnt terracotta that does exactly one job here — it warms the whole palette in the smallest dose. Use it the way you would a low flame, just a touch, and the charcoal around it starts to feel cozy and very much of this moment.