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.
