Mountain Pass vs Riverway
Both from Sherwin-Williams's palette. These are both blue-greys, so the question isn't which hue to choose — it's where within blue-grey to land. They have nearly identical light reflectance values (14 vs 16), so they'll read as similarly Dark in most lighting conditions. Mountain Pass runs neutral while Riverway is decidedly cool, which means they'll respond very differently to warm vs cool light sources. The ΔE 3.9 gap is real but not dramatic — close enough to use together, distinct enough to matter as a choice. Below you'll find 2 real-room photo comparisons where both colors appear side by side, plus 5 simulated room previews.
Mountain Pass vs Riverway in Real Spaces
2 real rooms side by side. Mountain Pass and Riverway 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. The temperature contrast between Riverway and Mountain Pass is what sets these apart most in this context.
Home Office
The test for a home office color isn't how it looks in a quick glance — it's whether it still feels right after a full day of work. Riverway brings more warmth to the space, while Mountain Pass keeps things cooler and crisper.
Color Details
Mountain Pass vs Riverway Simulated Comparison
5 simulated room previews — drag the slider on each to see Mountain Pass on one side and Riverway 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 Pass comparisons
See how Mountain Pass stacks up against other well-photographed colors across different brands and tones.
