Slate grey vs Perle Noir
Slate grey (RAL Classic) and Perle Noir (Sherwin-Williams) come from different manufacturers. Hue-wise, Slate grey belongs to the blue-grey family and Perle Noir to the grey family. The 4-point LRV gap — 12 for Slate grey vs 8 for Perle Noir — means Slate grey will open up a space more effectively. ΔE 3.3 means they're clearly different, but not dramatically so — they'd pair well in the same room. Below you'll find 2 real-room photo comparisons where both colors appear side by side, plus 5 simulated room previews.
Slate grey vs Perle Noir in Real Spaces
2 real rooms side by side. Slate grey and Perle Noir 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.
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. Slate grey has the edge in reflectance, which shows as a quiet sense of added space rather than an obvious contrast.
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. Slate grey reads slightly lighter here — a subtle but real difference in how open the space feels.
Color Details
Slate grey vs Perle Noir Simulated Comparison
5 simulated room previews — drag the slider on each to see Slate grey on one side and Perle Noir 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.
