White marble countertops and unlacquered brass hardware accent spacious kitchen cabinetry finished in earthy Cornwall Slate (Hex #949488) over walnut flooring.

Cornwall Slate SW 9131

Sherwin-Williams

LRV 29

What color is Cornwall Slate? Cornwall Slate by Sherwin-Williams is a complex, medium-dark gray with strong yellow-green undertones. This earthy, muted hue provides a cozy, profound depth that works exceptionally well on cabinetry or as a striking exterior color.

Visualize Save Saving

Will Cornwall Slate clash with your room?

Run a free Compatibility Check against your space.

Paint Technical Profile

Color ID / SKU	SW 9131
HEX Code	#949488
Light Reflectance (LRV)	29

Temperature	Warm
Primary Undertone	Green
Hidden Undertones	Gray, Yellow


Use	Interior, Exterior
Best Exposures	South, East
Best For	Kitchen cabinets, Accent walls, Exterior siding, Home offices

Digital Visualizations & Applications Explore curated design concepts and coordinating palettes.

A split digital conceptual board presenting rustic kitchen cabinets on top and a material flat-lay of natural zellige tile and antique brass below.

Digital color test: A rich green-gray cabinet finish illuminated by warm afternoon light, perfectly paired with reclaimed oak flooring.

Design Specifications

Lighting Exposure:Warm afternoon light
Wall Color:Greek Villa SW 7551
Hardware Finishes:Antique brass
Backsplash:Natural zellige tile
Flooring:Reclaimed oak

Complementary Paint Colors

Greek Villa Sherwin-Williams • SW 7551

A digital composite board featuring a dark accent wall framing a stone fireplace above, and a flat-lay with rust textile and natural stone below.

Conceptual layout: A dramatic earthy focal wall emphasized by directional window light and styled with rich rust textiles.

Design Specifications

Lighting Exposure:Directional window light
Surrounding Walls:Shoji White SW 7042
Focal Point:Natural stone fireplace
Styling Pro Tips:Incorporate rich rust and olive green textiles
Flooring:Wide plank oak

Complementary Paint Colors

Shoji White Sherwin-Williams • SW 7042

A split visualization layout showing a stately home exterior with painted lap siding on top, and a flat-lay of charcoal roofing and ornamental grass underneath.

Exterior visualization: A warm stone-colored facade glowing in golden hour sunlight, contrasted by crisp off-white trim and a black door.

Design Specifications

Lighting Exposure:Golden hour sunlight
Trim Color:Shoji White SW 7042
Door Color:Tricorn Black SW 6258
Roofing:Charcoal architectural shingles
Landscaping:Lush green shrubs and ornamental grasses

Complementary Paint Colors

Shoji White Sherwin-Williams • SW 7042

Tricorn Black Sherwin-Williams • SW 6258

A digital conceptual visualization split between a color-drenched dark home office above and a textured flat-lay of dark leather and walnut wood below.

Room mock-up: A deeply saturated, moody workspace featuring seamless painted wainscoting paired with a heavy walnut desk.

Design Specifications

Lighting Exposure:Soft moody ambient light
Color Drenching:Walls, wainscoting, and trim all painted Cornwall Slate
Furniture:Walnut executive desk
Hardware Finishes:Brushed gold
Vibe:Moody and focused

Room Compatibility & Clashes Diagnoses

Hackrea's reports evaluating the compatibility of Cornwall Slate in real rooms.

Match Score Verified

Tested Nov 1, 2026 Analyzed via Text Specs

West-Facing Traditional Kitchen Nook

Tested Surface: Main Walls

Golden-Honey Oak Cabinetry, Warm Greige-Taupe Subway Tile, Beige-Yellow Upper Drywall & Off-White Beadboard, ...

Hackrea Diagnostic Verdict

"The paint's earthy olive-slate undertone nicely balances the honey-oak cabinetry and greige-taupe backsplash tile, though applying this darker shade solely to the chair rail and window casing creates high-contrast striping against the warm cream upper wall and off-white beadboard."

Full 4-Pillar Report Locked

Curious how this works? Learn about our Paint Compatibility Diagnostic Engine