Cornwall Slate vs Illusive Green
Both are Sherwin-Williams colors. Hue-wise, Cornwall Slate belongs to the grey family and Illusive Green to the green-grey family. With LRVs of 29 and 29, they'll behave almost identically in terms of how much light they reflect back into a room. They share a neutral quality — useful to know if you're layering them in the same space. With a ΔE of 2.9, the difference is subtle — you'd need them side by side to reliably tell them apart. Below you'll find 5 real-room photo comparisons where both colors appear side by side, plus 5 simulated room previews.
Cornwall Slate vs Illusive Green in Real Spaces
5 real rooms side by side. Cornwall Slate and Illusive Green are close enough that the difference can be hard to judge from a chip alone — these photos show how each reads at scale, across different spaces and lighting conditions.
Living Room
Living rooms test a color across a full range of conditions — morning sun, afternoon shade, and evening lamp light all shift how both of these read. In photos like these you're seeing the difference at its most direct. In a finished room, the distinction is there but not dramatic.
Bedroom
Bedroom walls are often seen under warm artificial light, a context that shifts both colors from how they look on a chip. The two are close enough that the choice comes down to finer qualities — undertone, texture, what the color sits next to.
Bathroom
Bathrooms amplify color — the enclosed space and reflective surfaces make what reads subtle elsewhere feel more present here. The two are close enough that the choice comes down to finer qualities — undertone, texture, what the color sits next to.
House
At full exterior scale, the difference between these two colors becomes much easier to judge than from a small chip. The two are close enough that the choice comes down to finer qualities — undertone, texture, what the color sits next to.
Kitchen Cabinets
On cabinetry, undertone and temperature become more pronounced against countertops and hardware. The two are close enough that the choice comes down to finer qualities — undertone, texture, what the color sits next to.
Color Details
Cornwall Slate vs Illusive Green Simulated Comparison
5 simulated room previews — drag the slider on each to see Cornwall Slate on one side and Illusive Green 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.
Ammonite reflects far more light (LRV 69 vs 29), opening up a space where Cornwall Slate encloses it.
At LRV 83 vs 29, White Dove is decisively the brighter choice.
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.
Pigeon reflects far more light (LRV 51 vs 29), opening up a space where Cornwall Slate encloses it.
At LRV 29 vs 12, Cornwall Slate is decisively the brighter choice.
At LRV 29 vs 8, 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.
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.