Here the darkness isn't a detail but the starting point: the walls are in a near-black blue while the ceiling has been left pale. That difference is what stops the room closing in. There's no ceiling light at all — two table lamps and the glow behind the slats spread everything that's needed — and the single warm tone, ochre, appears in counted places: two cushions, the throw on the bench, and the peaks in the four paintings.
Items shown are similar to those in the video, not necessarily identical.
A matt emulsion in a deep blue, the kind that throws no grazing sheen. Buy all the paint for the room at once and box it together before starting, because between tins from different batches the tone difference shows at the join between two walls. A small patch painted on the actual wall and viewed at night under the light you'll use saves surprises.
See similar on Amazon(paid link)A series of four pictures in the same size and frame, made to hang as a grid. Buying the complete set avoids the problem of assembling loose frames: profile width and the tone of the gold vary between models, and in a block of four that difference shows instantly. Check they include hangers for both orientations and, ideally, a mounting template.
See similar on Amazon(paid link)A bedside lamp with a brass base and an undyed fabric shade, open at the top. In a dark room the pale shade is what you see lit and what anchors the eye; brass, too, is one of the few metals that still reads in low light. Use a warm dimmable bulb, because against a very dark wall the contrast with a lit shade is strong enough on its own.
See similar on Amazon(paid link)A long bench with a plain seat on tapered wooden legs. Raised legs are what save it in a dark room: a solid plinth base merges with the rug and the whole thing reads heavy, while legs let the rug's pattern run underneath. Size it slightly narrower than the bed, never the same.
See similar on Amazon(paid link)A velvet coverlet in a deep tone — the fabric that picks up low light best: it shifts tone depending on where you stand and gives a bed volume in a room with no overhead light. In exchange it shows every piece of lint and every crease, so shake it out and run a roller over it often, and keep it as the top layer rather than the cover you wash weekly.
See similar on Amazon(paid link)A panel finished black at the factory, which is what lets the band read against a dark wall instead of vanishing into it. Lacquered has one advantage over painting it yourself: the backing between slats is covered evenly, and that backing is impossible to paint properly with a roller. In black go for a matt finish, because satin throws back the reflection of every light source in the room.
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