A home office wants two things at once: enough calm to think and enough contrast to stay alert. Graphite Slate does the heavy lifting here — a charcoal with a faint warm-gray undertone, dark enough to anchor the room but never flat or industrial. Keep it to the wall behind your desk, where it frames your work and shows up cleanly on camera.
The other three walls take Warm Oat, a soft beige-leaning neutral that keeps the space from tipping cold. Against it the charcoal stops looking heavy and starts looking deliberate. Soft Chalk White on the trim and ceiling adds the crisp edge that holds the whole thing together and bounces daylight back down.
For grounding, lean on real material. Walnut Brown is your bookshelves and floating shelves — that warm midtone wood that makes charcoal feel like a study rather than a server room. Then save the Burnt Umber for one small surface, a desk, a drawer front, or a single painted nook. It is the deepest, earthiest note in the scheme, and a little of it goes a long way.