Mountain Moss vs Cement grey
Mountain Moss (Benjamin Moore) and Cement grey (RAL Classic) come from different manufacturers. Mountain Moss reads as beige-greige, while Cement grey reads as grey — two distinct hue families, not close cousins. The 7-point LRV gap — 24 for Cement grey vs 18 for Mountain Moss — means Cement grey will open up a space more effectively. A ΔE of 10.9 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.
Mountain Moss vs Cement grey in Real Spaces
4 real rooms side by side. Seeing Mountain Moss and Cement grey in actual rooms makes the difference concrete; browse the spaces below to get a feel for how each color lives on a wall.
Bathroom
Small bathrooms intensify color. A shade that seems quiet in a larger room can feel immersive when you're surrounded by it on four walls. Cement grey has the edge in reflectance, which shows as a quiet sense of added space rather than an obvious contrast.
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. Cement 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. Cement grey reads slightly lighter here — a subtle but real difference in how open the space feels.
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. Cement grey has the edge in reflectance, which shows as a quiet sense of added space rather than an obvious contrast.
Color Details
Mountain Moss vs Cement grey Simulated Comparison
5 simulated room previews — drag the slider on each to see Mountain Moss on one side and Cement 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 Mountain Moss comparisons
See how Mountain Moss stacks up against other well-photographed colors across different brands and tones.
At LRV 69 vs 18, Ammonite is decisively the brighter choice.
White Dove reflects far more light (LRV 83 vs 18), opening up a space where Mountain Moss encloses it.
Mountain Moss reflects far more light (LRV 18 vs 6), opening up a space where Iron Ore encloses it.
At LRV 52 vs 18, Purbeck Stone is decisively the brighter choice.
At LRV 30 vs 18, Evergreen Fog is decisively the brighter choice.
Mizzle reflects far more light (LRV 52 vs 18), opening up a space where Mountain Moss encloses it.
At LRV 60 vs 18, Agreeable Gray is decisively the brighter choice.
Accessible Beige reflects far more light (LRV 58 vs 18), opening up a space where Mountain Moss encloses it.
Denim Drift reads slightly lighter (LRV 27 vs 18), a gap that shows most in low-lit rooms.
At LRV 43 vs 18, French Gray is decisively the brighter choice.
At LRV 18 vs 4, Mountain Moss is decisively the brighter choice.
Tranquil Dawn reflects far more light (LRV 55 vs 18), opening up a space where Mountain Moss encloses it.
Mountain Moss reads slightly lighter (LRV 18 vs 13), a gap that shows most in low-lit rooms.
Hardwick White reflects far more light (LRV 44 vs 18), opening up a space where Mountain Moss encloses it.
At LRV 84 vs 18, Pure White is decisively the brighter choice.
A 4-point LRV gap (21 vs 18) makes Artichoke the marginally brighter of the two.
Balboa Mist reflects far more light (LRV 66 vs 18), opening up a space where Mountain Moss encloses it.
Shoji White reflects far more light (LRV 74 vs 18), opening up a space where Mountain Moss encloses it.
Snowbound reflects far more light (LRV 83 vs 18), opening up a space where Mountain Moss encloses it.
At LRV 51 vs 18, Pigeon is decisively the brighter choice.
Mountain Moss reads slightly lighter (LRV 18 vs 12), a gap that shows most in low-lit rooms.
Mountain Moss reads slightly lighter (LRV 18 vs 8), a gap that shows most in low-lit rooms.
Skimming Stone reflects far more light (LRV 68 vs 18), opening up a space where Mountain Moss encloses it.
At LRV 41 vs 18, Dix Blue is decisively the brighter choice.
Mountain Moss reads slightly lighter (LRV 18 vs 12), a gap that shows most in low-lit rooms.
Saybrook Sage reflects far more light (LRV 45 vs 18), opening up a space where Mountain Moss encloses it.
At LRV 31 vs 18, Pale Green is decisively the brighter choice.