Attitude Gray vs Cornwall Slate
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 Attitude Gray (LRV 20), a difference of 9 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. The ΔE 9.2 gap is real but not dramatic — close enough to use together, distinct enough to matter as a choice. Below you'll find 4 real-room photo comparisons where both colors appear side by side, plus 5 simulated room previews.
Attitude Gray vs Cornwall Slate in Real Spaces
4 real rooms side by side. Attitude Gray and Cornwall Slate 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
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 Attitude Gray would.
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 Attitude Gray.
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 Attitude Gray.
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 Attitude Gray.
Color Details
Attitude Gray vs Cornwall Slate Simulated Comparison
5 simulated room previews — drag the slider on each to see Attitude Gray on one side and Cornwall Slate 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.