How does Crystal blue (No.18 E 49) by BS 4800 compare with Johnstone's’s closest paints? The nearest match by perceptual distance is Johnstone's Salinity (ΔE 0.8, “identical”). 8 more Johnstone's colours sit within ΔE 4 — close enough that the difference is hard to spot once paint’s on the wall. These 9 Johnstone's paints are all priced at £12.36 per litre.
BS 4800 Crystal blue vs Johnstone's
9 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 |
|---|---|---|---|---|---|
| Salinity | — | 0.8 | identical | £12.36 | £2.06 |
| Cave Pearl | — | 0.8 | identical | £12.36 | £2.06 |
| Waterscape | — | 0.9 | identical | £12.36 | £2.06 |
| Tropical Dream | — | 0.9 | identical | £12.36 | £2.06 |
| Ice Floe | — | 1.0 | near-identical | £12.36 | £2.06 |
| Winter Shiver | — | 1.3 | near-identical | £12.36 | £2.06 |
| Ripple Of Mint | — | 1.5 | near-identical | £12.36 | £2.06 |
| Among The Clouds | — | 1.5 | near-identical | £12.36 | £2.06 |
| Free Spirit | — | 1.6 | near-identical | £12.36 | £2.06 |