allpaintcolours.co.ukHow does Water blue (No.5021) by RAL Classic compare with Johnstone's’s closest paints? The nearest match is Johnstone's New Journey (ΔE 2.7, “near-identical”). 2 more Johnstone's colours sit within ΔE 4 — close enough that the difference is hard to spot once paint’s on the wall. These 4 Johnstone's paints are all priced at £13.37 per litre.
RAL Classic Water blue vs Johnstone's
Now inside your AI toolConnect free →4 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 |
|---|---|---|---|---|---|
| New Journey | — | 2.7 | near-identical | £13.37 | £2.23 |
| Caribbean Splash | — | 3.2 | very close | £13.37 | £2.23 |
| Bimini Blue | — | 3.5 | very close | £13.37 | £2.23 |
| Deep Pool | — | 4.7 | very close | £13.37 | £2.23 |
Compare Water blue with another brand
Full RAL Classic → Johnstone's conversion chart — every colour's nearest equivalent