RAL 810-4 vs Mountain Pass
Where RAL 810-4 belongs to RAL Effect's range, Mountain Pass is a Sherwin-Williams color. Both sit in the blue-grey family, which is useful context if you're narrowing within a single hue direction. They have nearly identical light reflectance values (14 vs 14), so they'll read as similarly Dark in most lighting conditions. The ΔE 4.9 gap is real but not dramatic — close enough to use together, distinct enough to matter as a choice. Below you'll find 1 real-room photo comparison where both colors appear side by side, plus 5 simulated room previews.
RAL 810-4 vs Mountain Pass in Real Spaces
1 real room side by side. RAL 810-4 and Mountain Pass 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.
Living Room
In a living room, color works across both daylight and evening light — the same wall can read very differently at noon and at 8pm. Side by side like this, the difference is easy to read — which is exactly why seeing them in a real space is more useful than comparing chips.
Color Details
RAL 810-4 vs Mountain Pass Simulated Comparison
5 simulated room previews — drag the slider on each to see RAL 810-4 on one side and Mountain Pass 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 RAL 810-4 comparisons
See how RAL 810-4 stacks up against other well-photographed colors across different brands and tones.
White Dove reflects far more light (LRV 83 vs 14), opening up a space where RAL 810-4 encloses it.
At LRV 52 vs 14, Purbeck Stone is decisively the brighter choice.
At LRV 30 vs 14, Evergreen Fog is decisively the brighter choice.
At LRV 60 vs 14, Agreeable Gray is decisively the brighter choice.
Accessible Beige reflects far more light (LRV 58 vs 14), opening up a space where RAL 810-4 encloses it.
Denim Drift reflects far more light (LRV 27 vs 14), opening up a space where RAL 810-4 encloses it.
At LRV 43 vs 14, French Gray is decisively the brighter choice.
Tranquil Dawn reflects far more light (LRV 55 vs 14), opening up a space where RAL 810-4 encloses it.
Hardwick White reflects far more light (LRV 44 vs 14), opening up a space where RAL 810-4 encloses it.
At LRV 84 vs 14, Pure White is decisively the brighter choice.
Balboa Mist reflects far more light (LRV 66 vs 14), opening up a space where RAL 810-4 encloses it.
Shoji White reflects far more light (LRV 74 vs 14), opening up a space where RAL 810-4 encloses it.
With LRVs of 14 and 12, the two reflect almost the same amount of light.
Skimming Stone reflects far more light (LRV 68 vs 14), opening up a space where RAL 810-4 encloses it.
With LRVs of 14 and 12, the two reflect almost the same amount of light.
Saybrook Sage reflects far more light (LRV 45 vs 14), opening up a space where RAL 810-4 encloses it.
At LRV 31 vs 14, Pale Green is decisively the brighter choice.
A 7-point LRV gap (14 vs 7) makes RAL 810-4 the marginally brighter of the two.
A 10-point LRV gap (24 vs 14) makes Cement grey the marginally brighter of the two.
At LRV 57 vs 14, Guilford Green is decisively the brighter choice.