Match Castle Stone
PPG Castle Stone is a deep, low-reflectance shade with an LRV of 9. 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.
With LRVs of 10 and 9, the two reflect almost the same amount of light. At ΔE 2.1 you'd need them side by side to tell them apart.
With LRVs of 10 and 9, the two reflect almost the same amount of light. At ΔE 3.1 they're clearly different, yet close enough to share a room.
With LRVs of 12 and 9, the two reflect almost the same amount of light. At ΔE 3.2 they're clearly different, yet close enough to share a room.
Their light reflectance is nearly identical (LRV 11 vs 9), so neither reads brighter in a room. The ΔE 3.3 gap is real but not dramatic — distinct as a choice, harmonious together.
With LRVs of 11 and 9, the two reflect almost the same amount of light. At ΔE 3.9 they're clearly different, yet close enough to share a room.
With LRVs of 11 and 9, the two reflect almost the same amount of light. At ΔE 4.2 they're clearly different, yet close enough to share a room.
Their light reflectance is nearly identical (LRV 10 vs 9), so neither reads brighter in a room. The ΔE 4.7 gap is real but not dramatic — distinct as a choice, harmonious together.
Their light reflectance is nearly identical (LRV 11 vs 9), so neither reads brighter in a room. The ΔE 4.9 gap is real but not dramatic — distinct as a choice, harmonious together.
Forest Shade reads slightly lighter (LRV 13 vs 9), a gap that shows most in low-lit rooms. At ΔE 5.2 they're clearly different, yet close enough to share a room.
With LRVs of 11 and 9, the two reflect almost the same amount of light. At ΔE 5.6 they're clearly different, yet close enough to share a room.
With LRVs of 11 and 9, the two reflect almost the same amount of light. At ΔE 5.8 they're clearly different, yet close enough to share a room.
Organic Green reads slightly lighter (LRV 13 vs 9), a gap that shows most in low-lit rooms. At ΔE 6.6 they're clearly different, yet close enough to share a room.
S 6010-G30Y reads slightly lighter (LRV 14 vs 9), a gap that shows most in low-lit rooms. At ΔE 8.2 they're clearly different, yet close enough to share a room.
A 6-point LRV gap (15 vs 9) makes Sea Grove the marginally brighter of the two. A ΔE of 12.1 puts them firmly in different territory — a strong contrast if combined.