How does Purple (No.22 D 41) by BS 4800 compare with Johnstone's’s closest paints? The nearest match by perceptual distance is Johnstone's Sweet Lavender (ΔE 1.9, “near-identical”). 1 more Johnstone's colour sit within ΔE 4 — close enough that the difference is hard to spot once paint’s on the wall. Prices for these 9 Johnstone's paints range from £6.14 to £12.36 per litre.
BS 4800 Purple 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 |
|---|---|---|---|---|---|
| Sweet Lavender | — | 1.9 | near-identical | £6.14 | £1.02 |
| Purple Dragon | — | 3.0 | near-identical | £12.36 | £2.06 |
| Violet Dream | — | 4.0 | very close | £12.36 | £2.06 |
| Purple Essence | — | 5.2 | close | £12.36 | £2.06 |
| Petal Whisper | — | 5.4 | close | £12.36 | £2.06 |
| Village Fair | — | 5.5 | close | £12.36 | £2.06 |
| Windsor Purple | — | 6.0 | close | £12.36 | £2.06 |
| Puturple | — | 6.0 | close | £12.36 | £2.06 |
| Sleeping Violet | — | 6.4 | close | £12.36 | £2.06 |