Cos Cob Stonewall vs Treron
Cos Cob Stonewall (Benjamin Moore) and Treron (Farrow & Ball) come from different manufacturers. Cos Cob Stonewall reads as grey, while Treron reads as greige-grey — two distinct hue families, not close cousins. Their light reflectance values are nearly the same — 26 vs 25 — so neither will read significantly brighter or darker than the other. Where Cos Cob Stonewall leans green, Treron reads warm — a distinction that shifts noticeably depending on the light source and surrounding finishes. ΔE 6.0 means they're clearly different, but not dramatically so — they'd pair well in the same room. Below you'll find 3 real-room photo comparisons where both colors appear side by side, plus 5 simulated room previews.
Cos Cob Stonewall vs Treron in Real Spaces
3 real rooms side by side. Cos Cob Stonewall and Treron 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
A living room wall sees more varied light than almost any other surface in the house, which makes the choice between these two more nuanced than a chip suggests. Treron brings more warmth to the space, while Cos Cob Stonewall keeps things cooler and crisper.
Bedroom
Bedrooms are typically lit with warmer, lower light than the rest of the house — a condition that flatters warm tones and deepens cool ones. Cos Cob Stonewall reads more restrained here, while Treron adds a sense of enclosure and warmth.
Bathroom
Small bathrooms intensify color. A shade that seems quiet in a larger room can feel immersive when you're surrounded by it on four walls. Cos Cob Stonewall reads more restrained here, while Treron adds a sense of enclosure and warmth.
Color Details
Cos Cob Stonewall vs Treron Simulated Comparison
5 simulated room previews — drag the slider on each to see Cos Cob Stonewall on one side and Treron 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 Cos Cob Stonewall comparisons
See how Cos Cob Stonewall stacks up against other well-photographed colors across different brands and tones.
At LRV 83 vs 26, White Dove is decisively the brighter choice.
Ammonite reflects far more light (LRV 69 vs 26), opening up a space where Cos Cob Stonewall encloses it.
At LRV 26 vs 6, Cos Cob Stonewall is decisively the brighter choice.
Purbeck Stone reflects far more light (LRV 52 vs 26), opening up a space where Cos Cob Stonewall encloses it.
Evergreen Fog reads slightly lighter (LRV 30 vs 26), a gap that shows most in low-lit rooms.
At LRV 52 vs 26, Mizzle is decisively the brighter choice.
Agreeable Gray reflects far more light (LRV 60 vs 26), opening up a space where Cos Cob Stonewall encloses it.
At LRV 58 vs 26, Accessible Beige is decisively the brighter choice.
Their light reflectance is nearly identical (LRV 27 vs 26), so neither reads brighter in a room.
French Gray reflects far more light (LRV 43 vs 26), opening up a space where Cos Cob Stonewall encloses it.
Cos Cob Stonewall reflects far more light (LRV 26 vs 4), opening up a space where Naval encloses it.
At LRV 55 vs 26, Tranquil Dawn is decisively the brighter choice.
At LRV 26 vs 13, Cos Cob Stonewall is decisively the brighter choice.
At LRV 44 vs 26, Hardwick White is decisively the brighter choice.
Pure White reflects far more light (LRV 84 vs 26), opening up a space where Cos Cob Stonewall encloses it.
Cos Cob Stonewall reads slightly lighter (LRV 26 vs 21), a gap that shows most in low-lit rooms.
At LRV 66 vs 26, Balboa Mist is decisively the brighter choice.
At LRV 74 vs 26, Shoji White is decisively the brighter choice.
At LRV 83 vs 26, Snowbound is decisively the brighter choice.
At LRV 26 vs 12, Cos Cob Stonewall is decisively the brighter choice.
At LRV 68 vs 26, Skimming Stone is decisively the brighter choice.
Dix Blue reflects far more light (LRV 41 vs 26), opening up a space where Cos Cob Stonewall encloses it.
Calamine reflects far more light (LRV 68 vs 26), opening up a space where Cos Cob Stonewall encloses it.
At LRV 26 vs 12, Cos Cob Stonewall is decisively the brighter choice.
At LRV 45 vs 26, Saybrook Sage is decisively the brighter choice.
Pale Green reads slightly lighter (LRV 31 vs 26), a gap that shows most in low-lit rooms.
Cos Cob Stonewall reflects far more light (LRV 26 vs 7), opening up a space where Pine Needle encloses it.
With LRVs of 26 and 24, the two reflect almost the same amount of light.
Guilford Green reflects far more light (LRV 57 vs 26), opening up a space where Cos Cob Stonewall encloses it.
Just Walnut reflects far more light (LRV 72 vs 26), opening up a space where Cos Cob Stonewall encloses it.