Brompton Road No.205 is a Mylands sage green — soft, grey-tempered and very easy to live with — and the scheme practically builds itself if you keep everything gentle and natural around it.
Start with the whites. Sage green loves a warm off-white on trim, cornicing and ceilings. Paint & Paper Library Paper III (LRV 75.3) is soft and creamy without tipping yellow, and Farrow & Ball Au Lait (LRV 80) is a milky, gentle white that makes the green feel sun-warmed rather than institutional. A stark brilliant white next to sage tends to look hard — save it for crisp modern schemes, and even then think twice.
For depth, Mylands Cigar BH.20 (LRV 11.8) is the natural anchor — a mid tobacco brown that reads like old leather and dark timber. Use it on a fire surround, joinery or a bookcase and the sage immediately looks more considered. Green and brown is the countryside doing your colour theory for you.
For the accent, pink against sage is a classic — they sharpen each other. Dulux Fuchsia Falls 2 (LRV 29.8) is a bright, cool magenta-pink, so treat it as a jolt rather than a wall colour: a chair, a lampshade, the inside of a cupboard.
You can also drench Brompton Road across walls and woodwork for a soft, enveloping study or bedroom — sage is forgiving enough to take it without the room going gloomy.
Materials: limed and natural oak, terracotta, linen, aged brass. All of it flatters a grey-softened green.
Practical advice: two coats on a big board, viewed morning and evening and in the room's least-lit corner. Sage greens are shape-shifters — greyer in north light, fresher in south — so make sure you like both readings before you order the lot.