Match Signal blue
RAL Classic Signal blue is a deep, low-reflectance shade with an LRV of 10. 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.
Their light reflectance is nearly identical (LRV 10 vs 9), so neither reads brighter in a room. A ΔE of 1.0 means the difference barely reads in a finished room.
A 4-point LRV gap (10 vs 6) makes Signal blue the marginally brighter of the two. A ΔE of 1.3 means the difference barely reads in a finished room.
Signal blue reads slightly lighter (LRV 10 vs 7), a gap that shows most in low-lit rooms. At ΔE 2.1 you'd need them side by side to tell them apart.
With LRVs of 10 and 8, the two reflect almost the same amount of light. At ΔE 3.5 they're clearly different, yet close enough to share a room.
With LRVs of 10 and 9, the two reflect almost the same amount of light. At ΔE 4.0 they're clearly different, yet close enough to share a room.
With LRVs of 10 and 10, the two reflect almost the same amount of light. At ΔE 4.0 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 4.4 they're clearly different, yet close enough to share a room.
With LRVs of 10 and 8, the two reflect almost the same amount of light. At ΔE 6.0 they're clearly different, yet close enough to share a room.
Their light reflectance is nearly identical (LRV 10 vs 8), so neither reads brighter in a room. The ΔE 6.0 gap is real but not dramatic — distinct as a choice, harmonious together.
With LRVs of 12 and 10, the two reflect almost the same amount of light. At ΔE 11.3 these are two genuinely different directions, not variations on a theme.
With LRVs of 10 and 8, the two reflect almost the same amount of light. At ΔE 18.3 these are two genuinely different directions, not variations on a theme.
A 5-point LRV gap (15 vs 10) makes Pitch Blue the marginally brighter of the two. A ΔE of 19.7 puts them firmly in different territory — a strong contrast if combined.
Signal blue reads slightly lighter (LRV 10 vs 4), a gap that shows most in low-lit rooms. At ΔE 27.6 these are two genuinely different directions, not variations on a theme.
Passageway reads slightly lighter (LRV 14 vs 10), a gap that shows most in low-lit rooms. At ΔE 28.8 these are two genuinely different directions, not variations on a theme.