allpaintcolours.co.ukHow does Duchess blue (No.20 C 40) by BS 4800 compare with Coat’s closest paints? The nearest match is Coat 2AM (ΔE 2.6, “near-identical”). These 3 Coat paints are all priced at £24.80 per litre.
BS 4800 Duchess blue vs Coat
Now inside your AI toolConnect free →3 closest Coat 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 |
|---|---|---|---|---|---|
| 2AM | — | 2.6 | near-identical | £24.80 | £4.96 |
| Blue Blood | — | 5.6 | close | £24.80 | £4.96 |
| David Rose | — | 6.9 | close | £24.80 | £4.96 |
Compare Duchess blue with another brand
Full BS 4800 → Coat conversion chart — every colour's nearest equivalent