Match RAL 660-1
RAL Effect RAL 660-1 is a deep, low-reflectance shade with an LRV of 15. 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.
Mediterranean Blue reads slightly lighter (LRV 24 vs 15), a gap that shows most in low-lit rooms. At ΔE 2.8 you'd need them side by side to tell them apart.
A 11-point LRV gap (26 vs 15) makes Meridian Blue the marginally brighter of the two. The ΔE 4.9 gap is real but not dramatic — distinct as a choice, harmonious together.
A 12-point LRV gap (26 vs 15) makes North Pole Blue the marginally brighter of the two. The ΔE 9.6 gap is real but not dramatic — distinct as a choice, harmonious together.
A 9-point LRV gap (24 vs 15) makes Teal Touch the marginally brighter of the two. The ΔE 9.9 gap is real but not dramatic — distinct as a choice, harmonious together.
A 8-point LRV gap (23 vs 15) makes Light blue the marginally brighter of the two. A ΔE of 12.0 puts them firmly in different territory — a strong contrast if combined.
St Giles Blue reflects far more light (LRV 30 vs 15), opening up a space where RAL 660-1 encloses it. At ΔE 12.8 these are two genuinely different directions, not variations on a theme.
Blue Verditer reflects far more light (LRV 29 vs 15), opening up a space where RAL 660-1 encloses it. At ΔE 13.7 these are two genuinely different directions, not variations on a theme.
A 11-point LRV gap (26 vs 15) makes Sea Emerald the marginally brighter of the two. A ΔE of 24.1 puts them firmly in different territory — a strong contrast if combined.
Tidepool Wonder reads slightly lighter (LRV 27 vs 15), a gap that shows most in low-lit rooms. At ΔE 25.0 these are two genuinely different directions, not variations on a theme.
At LRV 28 vs 15, S 4010-B70G is decisively the brighter choice. A ΔE of 27.4 puts them firmly in different territory — a strong contrast if combined.