Teton Blue vs Cornwall Slate
Where Teton Blue belongs to Behr's range, Cornwall Slate is a Sherwin-Williams color. Hue-wise, Teton Blue belongs to the blue-grey family and Cornwall Slate to the grey family. They have nearly identical light reflectance values (31 vs 29), so they'll read as similarly Medium in most lighting conditions. Teton Blue runs blue while Cornwall Slate is decidedly neutral, which means they'll respond very differently to warm vs cool light sources. With a ΔE of 12.1, 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 4 real-room photo comparisons where both colors appear side by side, plus 5 simulated room previews.
Teton Blue vs Cornwall Slate in Real Spaces
4 real rooms side by side. Seeing Teton Blue and Cornwall Slate 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 temperature contrast between Cornwall Slate and Teton Blue is what sets these apart most in this context.
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 brings more warmth to the space, while Teton Blue keeps things cooler and crisper.
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 brings more warmth to the space, while Teton Blue keeps things cooler and crisper.
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 brings more warmth to the space, while Teton Blue keeps things cooler and crisper.
Color Details
Teton Blue vs Cornwall Slate Simulated Comparison
5 simulated room previews — drag the slider on each to see Teton Blue 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.
More Teton Blue comparisons
See how Teton Blue stacks up against other well-photographed colors across different brands and tones.
