Bond Street No.219 is a deep, muted slate — smoky and understated rather than saturated — and that's exactly why it drenches so well. Paint walls, woodwork and joinery all in it and the softness of the colour stops full immersion feeling theatrical; you get a calm, enveloping room rather than a statement one.
If you don't want full immersion, pair it with a clean off-white. Farrow & Ball All White (LRV 92) is a bright, neutral white with only the faintest warmth — no blue chill, no cream — so it lifts Bond Street without either fighting it or yellowing it. Ceilings, trim, adjacent walls: it's the simplest foil there is.
Ground the scheme low with pale flagstone or a grey-veined marble — a hearth or worktop anchors the depth and stops the room feeling top-heavy. Paint & Paper Library Blue Blood (LRV 16.4), a deep inky navy with a cool green-grey undertone, is a natural kindred tone for a connecting room or the back of a bookcase.
Now the warmth. A muted slate can take it, and Mylands Beehive Place No.140 (LRV 58.6) is the interesting route — a golden, honeyed yellow that reads like low sunshine against the slate. Use it in a hallway off the main room or inside shelving; blue-grey and gold is an old pairing because it works. For a bolder accent, Dulux Fuchsia Falls 2 (LRV 29.8) is a bright, cool magenta-pink — one chair, one lampshade, job done.
Metals: chrome, nickel and pewter keep it crisp; aged brass warms it alongside the Beehive Place route. Both work — pick a lane.
Practical advice: sample it big — two coats on an A3+ board — and look at it in the evening under lamplight as well as by day. Muted slates soften beautifully at night; that's when this colour earns its keep.