How does Duchess blue (No.20 C 40) by BS 4800 compare with Zoffany’s closest paints? The nearest match by perceptual distance is Zoffany Como Blue (ΔE 4.0, “very close”).
BS 4800 Duchess blue vs Zoffany
1 closest Zoffany 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 |
|---|---|---|---|---|---|
| Como Blue | No.ZOP0019 | 4.0 | very close | £22.00 | — |