Shale vs Viaduct
Where Shale belongs to Benjamin Moore's range, Viaduct is a Sherwin-Williams color. These are both greige-greys, so the question isn't which hue to choose — it's where within greige-grey to land. They have nearly identical light reflectance values (50 vs 50), so they'll read as similarly Medium in most lighting conditions. Shale runs red while Viaduct is decidedly warm, which means they'll respond very differently to warm vs cool light sources. At ΔE 0.9, these are close — the kind of difference that matters when choosing between them, but doesn't read strongly in a finished room. Below, 5 simulated room previews show how each color reads at scale — real-room photos will be added as they become available.
Color Details
Shale vs Viaduct Simulated Comparison
5 simulated room previews — drag the slider on each to see Shale on one side and Viaduct 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 Shale comparisons
See how Shale stacks up against other well-photographed colors across different brands and tones.
At LRV 83 vs 50, White Dove is decisively the brighter choice.
With LRVs of 52 and 50, the two reflect almost the same amount of light.
Shale reflects far more light (LRV 50 vs 30), opening up a space where Evergreen Fog encloses it.
Agreeable Gray reads slightly lighter (LRV 60 vs 50), a gap that shows most in low-lit rooms.
A 7-point LRV gap (58 vs 50) makes Accessible Beige the marginally brighter of the two.
At LRV 50 vs 27, Shale is decisively the brighter choice.
Shale reads slightly lighter (LRV 50 vs 43), a gap that shows most in low-lit rooms.
A 5-point LRV gap (55 vs 50) makes Tranquil Dawn the marginally brighter of the two.
A 7-point LRV gap (50 vs 44) makes Shale the marginally brighter of the two.
Pure White reflects far more light (LRV 84 vs 50), opening up a space where Shale encloses it.
At LRV 66 vs 50, Balboa Mist is decisively the brighter choice.
At LRV 74 vs 50, Shoji White is decisively the brighter choice.
At LRV 50 vs 12, Shale is decisively the brighter choice.
At LRV 68 vs 50, Skimming Stone is decisively the brighter choice.
At LRV 50 vs 12, Shale is decisively the brighter choice.
A 5-point LRV gap (50 vs 45) makes Shale the marginally brighter of the two.
Shale reflects far more light (LRV 50 vs 31), opening up a space where Pale Green encloses it.
Shale reflects far more light (LRV 50 vs 7), opening up a space where Pine Needle encloses it.
Shale reflects far more light (LRV 50 vs 24), opening up a space where Cement grey encloses it.
Guilford Green reads slightly lighter (LRV 57 vs 50), a gap that shows most in low-lit rooms.