Mountain Road vs Thames Fog
Mountain Road is a Sherwin-Williams color while Thames Fog comes from Valspar. These are both greys, so the question isn't which hue to choose — it's where within grey to land. At LRV 27 vs 23, Thames Fog will read as the brighter of the two — a 4-point gap that matters most in north-facing or low-light rooms. At ΔE 4.2, the difference is perceptible but not dramatic — the two can work harmoniously in the same space. Below you'll find 3 real-room photo comparisons where both colors appear side by side, plus 5 simulated room previews.
Mountain Road vs Thames Fog in Real Spaces
3 real rooms side by side. Mountain Road and Thames Fog 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.
Bedroom
Bedroom walls are often seen under warm artificial light, a context that shifts both colors from how they look on a chip. The brightness difference is modest but present — Thames Fog gives the walls a little more lift.
Dining Room
Dining room light is typically the warmest in the house, which shifts both colors toward the red end of the spectrum compared to daylight. Thames Fog reads slightly lighter here — a subtle but real difference in how open the space feels.
Bathroom
Bathrooms amplify color — the enclosed space and reflective surfaces make what reads subtle elsewhere feel more present here. The brightness difference is modest but present — Thames Fog gives the walls a little more lift.
Color Details
Mountain Road vs Thames Fog Simulated Comparison
5 simulated room previews — drag the slider on each to see Mountain Road on one side and Thames Fog 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 Road comparisons
See how Mountain Road stacks up against other well-photographed colors across different brands and tones.
