Polished Slate vs Rookwood Sash Green
Where Polished Slate belongs to Benjamin Moore's range, Rookwood Sash Green is a Sherwin-Williams color. Polished Slate reads as blue, while Rookwood Sash Green reads as blue-green — two distinct hue families, not close cousins. They have nearly identical light reflectance values (15 vs 13), so they'll read as similarly Dark in most lighting conditions. Polished Slate runs blue while Rookwood Sash Green is decidedly cool, which means they'll respond very differently to warm vs cool light sources. At ΔE 1.8, these are close — the kind of difference that matters when choosing between them, but doesn't read strongly in a finished room. Below, 5 simulated room previews show how each color reads at scale — real-room photos will be added as they become available.
Color Details
Polished Slate vs Rookwood Sash Green Simulated Comparison
5 simulated room previews — drag the slider on each to see Polished Slate on one side and Rookwood Sash Green 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 Polished Slate comparisons
See how Polished Slate stacks up against other well-photographed colors across different brands and tones.
