Slate grey vs Pewter Green
Slate grey (RAL Classic) and Pewter Green (Sherwin-Williams) come from different manufacturers. Hue-wise, Slate grey belongs to the blue-grey family and Pewter Green to the green-grey family. Their light reflectance values are nearly the same — 12 vs 12 — so neither will read significantly brighter or darker than the other. A ΔE of 10.4 puts these firmly in different territory — two distinct design choices rather than close alternatives. Below you'll find 4 real-room photo comparisons where both colors appear side by side, plus 5 simulated room previews.
Slate grey vs Pewter Green in Real Spaces
4 real rooms side by side. Seeing Slate grey and Pewter Green in actual rooms makes the difference concrete; browse the spaces below to get a feel for how each color lives on a wall.
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. At this scale, the choice between them becomes clear in a way that a swatch alone can't communicate.
House
A full exterior is the most demanding test for a paint color — scale and outdoor light both amplify differences that seem small on a swatch. At this scale, the choice between them becomes clear in a way that a swatch alone can't communicate.
Front Door
On a front door, the color is both the first and last thing you see — a context where even a modest tonal difference reads clearly. The distinction reads clearly at room scale, making the choice between them concrete.
Kitchen Cabinets
Cabinet color is always seen in context — against countertops, backsplash, and hardware — which amplifies undertone differences that might disappear on a plain wall. At this scale, the choice between them becomes clear in a way that a swatch alone can't communicate.
Color Details
Slate grey vs Pewter Green Simulated Comparison
5 simulated room previews — drag the slider on each to see Slate grey on one side and Pewter 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 Slate grey comparisons
See how Slate grey stacks up against other well-photographed colors across different brands and tones.
