How does Signal white (No.9003) by RAL Classic compare with Dulux’s closest paints? The nearest match is Dulux Rock Salt (ΔE 2.3, “near-identical”). 2 more Dulux colours sit within ΔE 4 — close enough that the difference is hard to spot once paint’s on the wall. Prices for these 3 Dulux paints range from £10.80 to £14.40 per litre.

RAL Classic Signal white (No.9003)

Dulux Rock Salt near-identical — ΔE 2.3 £10.80/L

RAL Classic Signal white vs Dulux

3 closest Dulux 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
Rock Salt	—	2.3	near-identical	£10.80	£1.66
Violet Surprise 6	—	2.3	near-identical	£14.40	£2.22
Mineral Haze 4	—	2.4	near-identical	£14.40	£2.22

Compare Signal white with another brand

Full RAL Classic → Dulux conversion chart — every colour's nearest equivalent

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