Match Cornwall Slate
Sherwin-Williams Cornwall Slate is a mid-tone shade, neutral in character with an LRV of 29. The matches below are the closest equivalents available across every brand on Pontata, ranked by ΔE — a perceptual color difference score. A ΔE under 3 is subtle; under 10 is noticeable but harmonious; above 25 means genuinely different colors.
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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 31 vs 29), so neither reads brighter in a room. A ΔE of 0.0 means the difference barely reads in a finished room.
With LRVs of 29 and 28, the two reflect almost the same amount of light. At ΔE 1.3 you'd need them side by side to tell them apart.
With LRVs of 30 and 29, the two reflect almost the same amount of light. At ΔE 1.4 you'd need them side by side to tell them apart.
Their light reflectance is nearly identical (LRV 29 vs 29), so neither reads brighter in a room. A ΔE of 1.5 means the difference barely reads in a finished room.
With LRVs of 30 and 29, the two reflect almost the same amount of light. At ΔE 2.0 you'd need them side by side to tell them apart.
With LRVs of 29 and 27, the two reflect almost the same amount of light. At ΔE 2.1 you'd need them side by side to tell them apart.
Their light reflectance is nearly identical (LRV 30 vs 29), so neither reads brighter in a room. A ΔE of 2.1 means the difference barely reads in a finished room.
With LRVs of 29 and 28, the two reflect almost the same amount of light. At ΔE 2.5 you'd need them side by side to tell them apart.
With LRVs of 29 and 29, the two reflect almost the same amount of light. At ΔE 3.0 you'd need them side by side to tell them apart.
A 3-point LRV gap (33 vs 29) makes Arctic Willow the marginally brighter of the two. A ΔE of 3.0 means the difference barely reads in a finished room.
With LRVs of 30 and 29, the two reflect almost the same amount of light. At ΔE 3.1 they're clearly different, yet close enough to share a room.
Their light reflectance is nearly identical (LRV 29 vs 27), so neither reads brighter in a room. The ΔE 3.5 gap is real but not dramatic — distinct as a choice, harmonious together.
With LRVs of 29 and 28, the two reflect almost the same amount of light. At ΔE 3.7 they're clearly different, yet close enough to share a room.
Their light reflectance is nearly identical (LRV 29 vs 29), so neither reads brighter in a room. The ΔE 4.1 gap is real but not dramatic — distinct as a choice, harmonious together.