How does Cooks Blue by Farrow & Ball compare with Johnstone's’s closest paints? The nearest match by perceptual distance is Johnstone's Blue Promise (ΔE 3.7, “very close”). 1 more Johnstone's colour sit within ΔE 4 — close enough that the difference is hard to spot once paint’s on the wall. These 5 Johnstone's paints are all priced at £12.36 per litre, against Farrow & Ball Cooks Blue at £25.60/L.
Farrow & Ball Cooks Blue vs Johnstone's
5 closest Johnstone's matches ranked by ΔE
ΔE (CIEDE2000) is a perceptual distance metric — lower means a closer match. Matches under ΔE 2 are typically indistinguishable; ΔE 2–4 looks “the same” once dry on a wall; ΔE 4–6 is noticeable side-by-side. Always view a sample pot before committing — screen colours and lighting vary.
| Colour | Number | ΔE | Match quality | Price/L | Price/m2 |
|---|---|---|---|---|---|
| Blue Promise | — | 3.7 | very close | £12.36 | £2.06 |
| Alaskan Blue | — | 4.0 | very close | £12.36 | £2.06 |
| American Anthem | — | 4.5 | very close | £12.36 | £2.06 |
| Walden Pond | — | 4.5 | very close | £12.36 | £2.06 |
| Flower Field | — | 4.5 | very close | £12.36 | £2.06 |