allpaintcolours.co.ukHow does Blue (No.20 E 53) by BS 4800 compare with Johnstone's’s closest paints? The nearest match is Johnstone's Sapphire Sky (ΔE 2.2, “near-identical”). 4 more Johnstone's colours 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 £13.37 per litre.
BS 4800 Blue vs Johnstone's
Now inside your AI toolConnect free →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 |
|---|---|---|---|---|---|
| Sapphire Sky | — | 2.2 | near-identical | £13.37 | £2.23 |
| Nocturne Shade | — | 2.7 | near-identical | £13.37 | £2.23 |
| Planetarium | — | 3.4 | very close | £13.37 | £2.23 |
| Cobalt Glaze | — | 3.6 | very close | £13.37 | £2.23 |
| Cenote | — | 3.7 | very close | £13.37 | £2.23 |
Compare Blue with another brand
Full BS 4800 → Johnstone's conversion chart — every colour's nearest equivalent