Cornwall Slate vs Thunderous
Both from Sherwin-Williams's palette. Both sit in the grey family, which is useful context if you're narrowing within a single hue direction. Cornwall Slate (LRV 29) reflects noticeably more light than Thunderous (LRV 15), a difference of 14 points that becomes especially apparent in rooms with limited natural light. Both lean neutral, so they'll behave similarly in mixed or changing light conditions. With a ΔE of 15.6, the contrast is hard to miss. These aren't variations on a theme — they're two different answers to the same question. Below you'll find 5 real-room photo comparisons where both colors appear side by side, plus 5 simulated room previews.
Cornwall Slate vs Thunderous in Real Spaces
5 real rooms side by side. Seeing Cornwall Slate and Thunderous 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
In a living room, color works across both daylight and evening light — the same wall can read very differently at noon and at 8pm. The LRV gap is large enough that Cornwall Slate will make the room feel meaningfully brighter than Thunderous would.
Bedroom
The context that matters most in a bedroom is how a color reads under a bedside lamp at night, not under noon daylight. Cornwall Slate reflects noticeably more light off the walls, making the space read more open than Thunderous.
Bathroom
Bathrooms are one of the few spaces where you're genuinely enclosed by the paint color, which makes the choice between these two more consequential. Cornwall Slate reflects noticeably more light off the walls, making the space read more open than Thunderous.
House
Seen across an entire facade, subtle tonal differences become pronounced. What reads as nearly the same on a chip often reads as clearly different at scale. Cornwall Slate reflects noticeably more light off the walls, making the space read more open than Thunderous.
Kitchen Cabinets
Kitchen cabinets are constantly compared against adjacent materials, which means subtle differences between these two become much more visible. Cornwall Slate reflects noticeably more light off the walls, making the space read more open than Thunderous.
Color Details
Cornwall Slate vs Thunderous Simulated Comparison
5 simulated room previews — drag the slider on each to see Cornwall Slate on one side and Thunderous 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.
