How does Signal yellow (No.1003) by RAL Classic compare with BS 4800’s closest paints? The nearest match by perceptual distance is BS 4800 Sunflower yellow (ΔE 0.8, “identical”). 1 more BS 4800 colour sit within ΔE 4 — close enough that the difference is hard to spot once paint’s on the wall.
RAL Classic Signal yellow vs BS 4800
2 closest BS 4800 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 |
|---|---|---|---|---|---|
| Sunflower yellow | No.10 E 53 | 0.8 | identical | — | — |
| Canary Yellow | No.10 E 55 | 3.2 | very close | — | — |