Gray Mountain vs Black grey
Gray Mountain (Benjamin Moore) and Black grey (RAL Classic) come from different manufacturers. Hue-wise, Gray Mountain belongs to the grey family and Black grey to the blue-grey family. The 12-point LRV gap — 19 for Gray Mountain vs 6 for Black grey — means Gray Mountain will open up a space more effectively. A ΔE of 28.4 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.
Gray Mountain vs Black grey in Real Spaces
1 real room side by side. Seeing Gray Mountain and Black grey in actual rooms makes the difference concrete; browse the spaces below to get a feel for how each color lives on a wall.
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. Gray Mountain reflects noticeably more light off the walls, making the space read more open than Black grey.
Color Details
Gray Mountain vs Black grey Simulated Comparison
5 simulated room previews — drag the slider on each to see Gray Mountain on one side and Black grey 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 Gray Mountain comparisons
See how Gray Mountain stacks up against other well-photographed colors across different brands and tones.
