Cos Cob Stonewall vs Mill Springs Blue
Cos Cob Stonewall and Mill Springs Blue come from the same Benjamin Moore collection. Cos Cob Stonewall reads as grey, while Mill Springs Blue reads as blue — two distinct hue families, not close cousins. The 7-point LRV gap — 34 for Mill Springs Blue vs 26 for Cos Cob Stonewall — means Mill Springs Blue will open up a space more effectively. Where Cos Cob Stonewall leans green, Mill Springs Blue reads green and blue — a distinction that shifts noticeably depending on the light source and surrounding finishes. A ΔE of 13.3 puts these firmly in different territory — two distinct design choices rather than close alternatives. Below you'll find 1 real-room photo comparison where both colors appear side by side, plus 5 simulated room previews.
Cos Cob Stonewall vs Mill Springs Blue in Real Spaces
1 real room side by side. Seeing Cos Cob Stonewall and Mill Springs Blue 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
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. Mill Springs Blue reads slightly lighter here — a subtle but real difference in how open the space feels.
Color Details
Cos Cob Stonewall vs Mill Springs Blue Simulated Comparison
5 simulated room previews — drag the slider on each to see Cos Cob Stonewall on one side and Mill Springs Blue 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.
