How does Duchess blue (No.20 C 40) by BS 4800 compare with Dulux Heritage’s closest paints? The nearest match by perceptual distance is Dulux Heritage DH Oxford Blue (Heritage) (ΔE 1.5, “near-identical”).
BS 4800 Duchess blue vs Dulux Heritage
1 closest Dulux Heritage match 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 |
|---|---|---|---|---|---|
| DH Oxford Blue (Heritage) | No.LRV 6 | 1.5 | near-identical | £10.40 | £1.30 |