Cornwall Slate (SW 9131)
Illustrative room. Screen colors vary; test a sample before you paint.
Cornwall Slate (SW 9131) is a deep, warm gray from Sherwin-Williams: LRV 29, so it reflects about 29 percent of the light that hits it.
Colors that go with Cornwall Slate
Four Sherwin-Williams colors picked for Cornwall Slate by this site's color math: a trim white, a deeper gray, a quiet contrast from another family, a dark accent. Sherwin-Williams did not choose these pairings.
Closest match in every other brand
Each brand's closest color to Cornwall Slate, ranked by CIEDE2000 (deltaE): under 1.0 is indistinguishable, 1.0 to 2.3 very close, 2.3 to 5 noticeably different, over 5 clearly different.
| Brand | Closest color | Code | LRV | deltaE | How close |
|---|---|---|---|---|---|
| Benjamin Moore | Storm Cloud Gray | 2140-40 | 28.9 | 1.3 | very close |
| Behr | Shady Willow | ECC-36-1 | 29.8 | 1.7 | very close |
| Valspar | Gray Exposé | 5007-2A | 33 | 3.3 | noticeably different |
| PPG Paints | Sylvan | 1032-4 | 29 | 2.9 | noticeably different |
Lighter and darker in Sherwin-Williams
The Sherwin-Williams gray colors nearest to Cornwall Slate (LRV 29) by LRV.
Lighter than Cornwall Slate
Darker than Cornwall Slate
Color data
| Brand | Sherwin-Williams |
|---|---|
| Color code | SW 9131 |
| Hex | #949488 |
| RGB | 148, 148, 136 |
| HSL | 60°, 5%, 56% |
| LRV (light reflectance value) | 29 |
| Lab L*, a*, b* | 61.0, -2.2, 6.4 |
| Undertone | Neutral |
| Temperature | warm |
| Color family | Gray |
Same paint, two kinds of light
Cornwall Slate (SW 9131), published as #949488
#848A86
#A59E88
These swatches and the rooms above are a simulation, not a measurement. How the visualizer works
Similar shades from Sherwin-Williams
Comparisons that include Cornwall Slate (SW 9131)
More from Sherwin-Williams
Common questions
- What is the LRV of Cornwall Slate (SW 9131)?
- Cornwall Slate has an LRV of 29. LRV runs from 0 (black) to 100 (pure white) and measures the share of light a surface reflects, so Cornwall Slate is a deep color.
- What is the closest match to Cornwall Slate in another brand?
- Storm Cloud Gray (BM 2140-40) from Benjamin Moore, at a deltaE of 1.3 (very close).
- Is Cornwall Slate warm or cool?
- Sherwin-Williams lists Cornwall Slate as warm, with a Neutral undertone. Its Lab b* value is 6.4; a higher b* is warmer and yellower, a lower one cooler and bluer.
Sources: LRV and hex as published by the manufacturer, via PaintDB (CC BY 4.0). Color differences are CIEDE2000 values computed by this site from the hex values (data snapshot 2026-10-01). Color names and codes belong to their manufacturers.