Castle Gray is a light green from Farrow & Ball. As a premium paint, it’s a popular colour to seek out close matches and value-brand alternatives to.
Steel Curtain by Johnstone's is the closest match from any other brand (very close) — though it’s slightly softer. It’s also the best-value tier of the close matches — unusual, as the nearest match and the best-value one usually differ. Only one of the 8 other brands manages a near-identical match, which makes Castle Gray fairly distinctive. LRV is estimated from each brand’s swatch, so order testers before committing.
Below is every genuinely close match to Castle Gray from the other eight brands — ranked purely by closeness, so where one brand has several near-misses, they all appear. For the single best match per brand, see the Castle Gray colour page.
The nearest Dulux colour is Storm Clearing (very close). It won’t be pixel-perfect, so order a tester before committing.
Of the close matches, Steel Curtain by Johnstone's is the best-value option (value, very close).
The list shows every genuinely close match from other brands, ranked nearest-first by perceptual colour difference — including several from one brand where they’re all close. Screens differ from paint on a wall, so treat these as a shortlist and always order tester pots.
Search any paint name in the tool to see its closest matches across every UK brand.
See the full Castle Gray colour page →