Match RAL 640-2
RAL Effect RAL 640-2 is a deep, low-reflectance shade with an LRV of 13. 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.
Light blue reads slightly lighter (LRV 23 vs 13), a gap that shows most in low-lit rooms. At ΔE 1.1 you'd need them side by side to tell them apart.
A 4-point LRV gap (17 vs 13) makes Blue Plate the marginally brighter of the two. The ΔE 4.5 gap is real but not dramatic — distinct as a choice, harmonious together.
Electric Blue reflects far more light (LRV 28 vs 13), opening up a space where RAL 640-2 encloses it. At ΔE 6.2 they're clearly different, yet close enough to share a room.
At LRV 26 vs 13, Peaceful River is decisively the brighter choice. A ΔE of 10.5 puts them firmly in different territory — a strong contrast if combined.
At LRV 30 vs 13, St Giles Blue is decisively the brighter choice. A ΔE of 11.8 puts them firmly in different territory — a strong contrast if combined.
At LRV 32 vs 13, Delicate Cornflower is decisively the brighter choice. A ΔE of 12.0 puts them firmly in different territory — a strong contrast if combined.
With LRVs of 14 and 13, the two reflect almost the same amount of light. At ΔE 27.3 these are two genuinely different directions, not variations on a theme.
RAL 640-2 reads slightly lighter (LRV 13 vs 8), a gap that shows most in low-lit rooms. At ΔE 28.0 these are two genuinely different directions, not variations on a theme.
S 5010-R90B reads slightly lighter (LRV 19 vs 13), a gap that shows most in low-lit rooms. At ΔE 28.8 these are two genuinely different directions, not variations on a theme.