Match RAL 640-5
RAL Effect RAL 640-5 is a deep, low-reflectance shade with an LRV of 6. The matches below are ranked by ΔE, a perceptual color-difference score.
View full RAL 640-5 color page →
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.
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.
Cobalt Embrace reads slightly lighter (LRV 9 vs 6), a gap that shows most in low-lit rooms. At ΔE 2.1 you'd need them side by side to tell them apart.
Their light reflectance is nearly identical (LRV 8 vs 6), so neither reads brighter in a room. A ΔE of 2.4 means the difference barely reads in a finished room.
A 3-point LRV gap (9 vs 6) makes Stunning Sapphire the marginally brighter of the two. The ΔE 4.9 gap is real but not dramatic — distinct as a choice, harmonious together.
A 4-point LRV gap (10 vs 6) makes California Blue the marginally brighter of the two. The ΔE 5.3 gap is real but not dramatic — distinct as a choice, harmonious together.
With LRVs of 8 and 6, the two reflect almost the same amount of light. At ΔE 5.5 they're clearly different, yet close enough to share a room.
Their light reflectance is nearly identical (LRV 8 vs 6), so neither reads brighter in a room. A ΔE of 19.4 puts them firmly in different territory — a strong contrast if combined.
Pitch Blue reads slightly lighter (LRV 15 vs 6), a gap that shows most in low-lit rooms. At ΔE 20.1 these are two genuinely different directions, not variations on a theme.
Their light reflectance is nearly identical (LRV 6 vs 4), so neither reads brighter in a room. A ΔE of 27.4 puts them firmly in different territory — a strong contrast if combined.
A 8-point LRV gap (14 vs 6) makes Passageway the marginally brighter of the two. A ΔE of 29.7 puts them firmly in different territory — a strong contrast if combined.