Simply White is one of those whites that just gets on with the job, mate. It's a clean, soft white with the faintest warmth — which makes it a brilliant universal trim and ceiling shade in schemes built around cool or neutral walls. Its whole purpose is to disappear and let the rest of the room breathe.
The trick is to keep your wall colours soft and slightly cool, so Simply White reads as crisp rather than yellow. Three pairings I'd trust:
Pale grey-blue. Paint & Paper Library's Slate IV (LRV 67.5) sits lovely against Simply White — light enough to keep things airy, with just enough cool grey to make the white feel sharp and considered. Perfect for a north-facing room where you want calm, not clinical.
Deep washed blue for drama. If you want a richer wall, Dulux's Sapphire Springs 1 (LRV 6.4) is properly dark and inky. Against Simply White woodwork it gives you that high-contrast, tailored look — think panelling or a feature wall with white architraves cutting through.
Muted green. Mylands' Artichoke BH.13 (LRV 27.6) is a soft, slightly dusty green that flatters warm white beautifully. It's a grown-up, restful pairing — works a treat in a study, snug or hallway.
Now, the usual "but what about" — *can I use Simply White on the walls too?* You can, but don't expect the colour to carry the room. When Simply White goes on walls, the interest has to come from texture and objects: linen curtains, stone, timber, brass, art. Add warmth through materials, not more colour. A flat white room with nothing to look at will feel a bit lifeless.
Practical tip: always order a sample pot and paint it next to your chosen wall colour, then look at it morning and evening. Whites shift more than any other shade depending on light — and a warm white like this can tip yellow under low-watt warm bulbs. Get the lighting right and it'll sing.