A study is one of the few rooms where going dark really pays off. Deep ink navy on the walls wraps the space and signals focus, the kind of color that makes a desk feel like a place to actually get work done. It is rich without being black, with just enough blue to stay calm rather than heavy.
To keep it from feeling like a cave, a warm white runs along the trim, ceiling, and door casings, drawing a crisp edge around all that depth. Charcoal carries through on built-in shelving or a desk, sitting a half-step away from the navy so the room reads layered instead of flat. The finishing touch is brass tan — on a lamp, drawer pulls, or frames — adding a quiet glow that warms the whole scheme. Keep the brass small and the navy stays the star.