Sherwin Williams

Cornwall Slate

SW 9131

Cornwall Slate (hex #949488) is a muted, cool-leaning green-gray with an LRV of 29. The gray cast is dominant, with green undertones appearing subtly depending on surrounding light and adjacent colors. At this reflectance level, it reads as a solidly mid-tone neutral that neither advances nor recedes strongly.

Its understated green quality keeps it from feeling as stark as a pure gray. Sherwin-Williams Snowbound and Modern Gray pair well as lighter layering tones, while Sherwin-Williams Iron Ore and Urbane Bronze offer grounding dark contrast within a cool, natural material-driven palette.

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Brand

Sherwin Williams

Code

SW 9131

Collection

Southwest Color Scheme 2, Texas Scheme 3

Cornwall Slate in Real Homes (7 Photos)

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Cornwall Slate in Different Light

Light temperature is measured in Kelvin: a warm 2700K bulb pulls colors toward yellow, while 5000K daylight reads cooler and truer. Check the color at the time of day you actually use the room.

Artificial Lighting

Bedroom scene to simulate Sherwin Williams Cornwall Slate under artificial light

Light Temperature: 2700K

Natural Lighting

Living room scene to simulate Sherwin Williams Cornwall Slate under natural light

Light Temperature: 4500K

Technical Specifications

Undertones

Type

Yellow

Strength

Low

Temperature

neutral

Hue Angle

60°

Yellow Family

Lightness

56%

Medium

Saturation

Very Muted

LRV

29.0

0%100%

Very Dark

Dark

Medium

Light

Very Light

White

LRV measures how much light a color reflects, from 0 (black) to 100 (pure white). Below about 50 a color needs good lighting to avoid going flat, 60 and up helps brighten a room, and most whites sit above 80.

Color Position

Saturation →

Lightness →

Color Codes

HEX

#949488

RGB Decimal

148, 148, 136

RGB Percent

58.0%, 58.0%, 53.3%

HSL

60.0, 5.3%, 55.7%

HSV

60.0, 8.1%, 58.0%

CMYK

0.0%, 0.0%, 8.1%, 42.0%

YIQ

146.6, 3.9, -3.7

XYZ

27.25, 29.25, 27.50

CIE Lab

61.00, -2.23, 6.34

CIE Luv

61.00, 0.67, 9.21

Hunter Lab

54.09, -1.90, 5.17

Decimal

9737352

Coordinating Colors and Color Palettes

Darker Shades

Monochromatic dark

Cornwall Slate Lead Cast Magnet Naturalism

Lighter Shades

Monochromatic light

Cornwall Slate Lamp Room Gray Sweater Weather Teapot

Complementary

Opposite on color wheel

Cornwall Slate Wisteria Ground Truth Enchanted

Analogous

Adjacent colors

Cornwall Slate Husky Gray Eiffel Tower Intrigue

Closest Paint Matches

Cross-brand matches are close, never exact. Each brand uses different bases and sheens, so sample before you buy gallons.

Sherwin Williams

Cornwall Slate

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Evergreen Fog

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Cornwall Slate

Glidden

Mt. Rainier

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Cornwall Slate

Farrow & Ball

Stoke

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Cornwall Slate

Glidden

Lazy Afternoon

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Behr

Elephant Skin

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Farrow & Ball

Chemise

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Cornwall Slate

Valspar

Tabby Cat Gray

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Benjamin Moore

Storm Cloud Gray

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Cornwall Slate

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Illusive Green

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Cornwall Slate

Valspar

Gray Expose

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Cornwall Slate

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Jade Dragon

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Cornwall Slate

Glidden

Green Tea Leaf

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Cornwall Slate

Glidden

Steeped Tea

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Cornwall Slate

Behr

Grant Gray

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Cornwall Slate

Benjamin Moore

Graystone

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Cornwall Slate

Valspar

Worlds Away