Frosted Dawn is one of those easy-going Dulux neutrals that does most of the heavy lifting for you — and its undertone is a warm yellow-green, which is the fact that should steer every pairing. Feed that gentle warmth and the room feels settled; fight it with icy whites and it looks washed out.
For a relaxed, restful scheme, layer it with warm woods — oak, walnut, a bit of rattan — and natural textures like linen and wool. They pick up the warmth already sitting in the paint. Paint & Paper Library Slate IV (LRV 67.5) is a cracking partner: a warm grey-green with an olive lean that shares Frosted Dawn's temperature, lovely on panelling, woodwork or a connecting wall.
For quiet contrast, go deeper into the green family. Mylands Artichoke BH.13 (LRV 27.6) is a soft, dusty olive that grounds Frosted Dawn without going loud — panelling, joinery, a lower wall.
For a proper anchor — a front door, kitchen island, a feature piece — Dulux Sapphire Springs 1 (LRV 6.4) gives you a deep, inky slate-blue moment. That cool depth against a warm neutral is a deliberate contrast, and at LRV 6.4 it's genuinely dark, so use it as punctuation rather than wall-to-wall.
Whites and ceilings: warm whites and soft creams sit happily with Frosted Dawn — same family, no argument. The one to avoid is a blue-toned brilliant white, which makes the yellow-green undertone look slightly grubby by comparison.
Practical advice: two coats on big A3 boards, viewed morning and evening and in the room's least-lit spot. That warm undertone is a quiet asset in a north-facing room — it stops grey daylight flattening everything — so don't be afraid to use it where the light is cool. Sorted.