Match RAL 640-3
RAL Effect RAL 640-3 is a deep, low-reflectance shade with an LRV of 11. The matches below are ranked by ΔE, a perceptual color-difference score.
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Closest matches across every brand
One match per brand, ranked by ΔE — a perceptual color difference score calculated from Lab color space values. Lower is closer. Click any card to compare side by side in simulated rooms.
Blue Macaw reads slightly lighter (LRV 18 vs 11), a gap that shows most in low-lit rooms. At ΔE 4.4 they're clearly different, yet close enough to share a room.
With LRVs of 11 and 10, the two reflect almost the same amount of light. At ΔE 7.4 they're clearly different, yet close enough to share a room.
Delicate Cornflower reflects far more light (LRV 32 vs 11), opening up a space where RAL 640-3 encloses it. At ΔE 14.1 these are two genuinely different directions, not variations on a theme.
St Giles Blue reflects far more light (LRV 30 vs 11), opening up a space where RAL 640-3 encloses it. At ΔE 16.2 these are two genuinely different directions, not variations on a theme.
A 3-point LRV gap (11 vs 8) makes RAL 640-3 the marginally brighter of the two. A ΔE of 25.2 puts them firmly in different territory — a strong contrast if combined.
A 3-point LRV gap (14 vs 11) makes Passageway the marginally brighter of the two. A ΔE of 27.4 puts them firmly in different territory — a strong contrast if combined.
A 8-point LRV gap (19 vs 11) makes S 5010-R90B the marginally brighter of the two. A ΔE of 29.6 puts them firmly in different territory — a strong contrast if combined.