Cornwall Slate vs Dusty Heather
Cornwall Slate and Dusty Heather come from the same Sherwin-Williams collection. Cornwall Slate reads as grey, while Dusty Heather reads as blue-grey — two distinct hue families, not close cousins. Their light reflectance values are nearly the same — 29 vs 28 — so neither will read significantly brighter or darker than the other. Where Cornwall Slate leans neutral, Dusty Heather reads cool — a distinction that shifts noticeably depending on the light source and surrounding finishes. A ΔE of 17.7 puts these firmly in different territory — two distinct design choices rather than close alternatives. Below you'll find 4 real-room photo comparisons where both colors appear side by side, plus 5 simulated room previews.
Cornwall Slate vs Dusty Heather in Real Spaces
4 real rooms side by side. Seeing Cornwall Slate and Dusty Heather in actual rooms makes the difference concrete; browse the spaces below to get a feel for how each color lives on a wall.
Living Room
A living room wall sees more varied light than almost any other surface in the house, which makes the choice between these two more nuanced than a chip suggests. Dusty Heather brings more warmth to the space, while Cornwall Slate keeps things cooler and crisper.
Bedroom
Bedrooms are typically lit with warmer, lower light than the rest of the house — a condition that flatters warm tones and deepens cool ones. Cornwall Slate reads more restrained here, while Dusty Heather adds a sense of enclosure and warmth.
Bathroom
Small bathrooms intensify color. A shade that seems quiet in a larger room can feel immersive when you're surrounded by it on four walls. Cornwall Slate reads more restrained here, while Dusty Heather adds a sense of enclosure and warmth.
House
A full exterior is the most demanding test for a paint color — scale and outdoor light both amplify differences that seem small on a swatch. Cornwall Slate reads more restrained here, while Dusty Heather adds a sense of enclosure and warmth.
Color Details
Cornwall Slate vs Dusty Heather Simulated Comparison
5 simulated room previews — drag the slider on each to see Cornwall Slate on one side and Dusty Heather on the other.
Digital color is approximate. These simulations are generated from the manufacturer's hex values and overlaid on grayscale room photos — your screen's calibration, brightness, and viewing angle all affect how they render. Before committing to either color, test physical samples in your own space under the light you actually live with.
More Cornwall Slate comparisons
See how Cornwall Slate stacks up against other well-photographed colors across different brands and tones.
At LRV 83 vs 29, White Dove is decisively the brighter choice.
Ammonite reflects far more light (LRV 69 vs 29), opening up a space where Cornwall Slate encloses it.
At LRV 29 vs 6, Cornwall Slate is decisively the brighter choice.
Purbeck Stone reflects far more light (LRV 52 vs 29), opening up a space where Cornwall Slate encloses it.
With LRVs of 30 and 29, the two reflect almost the same amount of light.
At LRV 52 vs 29, Mizzle is decisively the brighter choice.
Agreeable Gray reflects far more light (LRV 60 vs 29), opening up a space where Cornwall Slate encloses it.
At LRV 58 vs 29, Accessible Beige is decisively the brighter choice.
Their light reflectance is nearly identical (LRV 29 vs 27), so neither reads brighter in a room.
French Gray reflects far more light (LRV 43 vs 29), opening up a space where Cornwall Slate encloses it.
Cornwall Slate reflects far more light (LRV 29 vs 4), opening up a space where Naval encloses it.
At LRV 55 vs 29, Tranquil Dawn is decisively the brighter choice.
At LRV 29 vs 13, Cornwall Slate is decisively the brighter choice.
At LRV 44 vs 29, Hardwick White is decisively the brighter choice.
Pure White reflects far more light (LRV 84 vs 29), opening up a space where Cornwall Slate encloses it.
Cornwall Slate reads slightly lighter (LRV 29 vs 21), a gap that shows most in low-lit rooms.
At LRV 66 vs 29, Balboa Mist is decisively the brighter choice.
At LRV 74 vs 29, Shoji White is decisively the brighter choice.
At LRV 83 vs 29, Snowbound is decisively the brighter choice.
At LRV 29 vs 12, Cornwall Slate is decisively the brighter choice.
At LRV 68 vs 29, Skimming Stone is decisively the brighter choice.
Dix Blue reads slightly lighter (LRV 41 vs 29), a gap that shows most in low-lit rooms.
Calamine reflects far more light (LRV 68 vs 29), opening up a space where Cornwall Slate encloses it.
Cornwall Slate reads slightly lighter (LRV 29 vs 25), a gap that shows most in low-lit rooms.
At LRV 29 vs 12, Cornwall Slate is decisively the brighter choice.
At LRV 45 vs 29, Saybrook Sage is decisively the brighter choice.
With LRVs of 31 and 29, the two reflect almost the same amount of light.
Cornwall Slate reflects far more light (LRV 29 vs 7), opening up a space where Pine Needle encloses it.
Cornwall Slate reads slightly lighter (LRV 29 vs 24), a gap that shows most in low-lit rooms.
Guilford Green reflects far more light (LRV 57 vs 29), opening up a space where Cornwall Slate encloses it.