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IndustrialSouth-Facing

Cornwall Slate

Sherwin-Williams · SW9131

The Analysis

Cornwall Slate is a mid-toned, greenish-grey that grounds a room without making it feel claustrophobic. With an LRV of 29.25, it absorbs a fair amount of light, which creates a cozy, enclosed feeling rather than an airy or expansive one.

It functions best as a sophisticated backdrop or a saturated statement color. It works well on cabinetry or accent walls to provide depth, but use it sparingly in small rooms without windows to avoid making the space feel like a cave.

LRV 29

History & Origin

This color leans toward a modern, updated take on heritage aesthetics. It fits perfectly in contemporary homes that want to nod to traditional slate and stone palettes without feeling dusty or outdated.

Undertoneneutral
FamilyGreen-Yellow

How to Use It

This shade excels in home offices or moody dens paired with warm walnut wood tones and matte black hardware. If you use it in a kitchen or bathroom, pair it with polished brass to add a necessary touch of brightness and warmth against the cool grey-green base.

The Mood

This color provides a stable, balanced atmosphere that feels professional and collected. It is highly restful, making it an excellent choice for areas where you want to reduce visual clutter and lower the stress levels of the room.

Colour harmonies

Complementary

Opposite on the colour wheel — bold, high-contrast pairings. Use for a feature wall or furniture you want to command attention.

Analogous

Neighbouring hues — cohesive and calm, great for layered schemes that feel collected rather than matched.

Split complementary

Near-opposites for strong contrast with a little less tension than a pure complement. A favourite of interior designers.

Triadic

Three evenly spaced hues — balanced, vibrant, and versatile. Keep one dominant and use the others sparingly.

Tetradic (square)

Four hues in a square on the wheel — rich, dynamic palettes. Best when one colour leads and the others accent.

Monochromatic

Dark, mid, and light steps on the same hue — a failsafe gradient for trim, walls, and accents without shifting colour family.

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Lighting

See how this colour shifts across natural and artificial light conditions.

  • Natural