Cathedral Gray vs Thames Fog
Cathedral Gray is a Benjamin Moore color while Thames Fog comes from Valspar. Hue-wise, Cathedral Gray belongs to the greige-grey family and Thames Fog to the grey family. With LRVs of 26 and 27, they'll behave almost identically in terms of how much light they reflect back into a room. At ΔE 4.4, the difference is perceptible but not dramatic — the two can work harmoniously in the same space. Below you'll find 2 real-room photo comparisons where both colors appear side by side, plus 5 simulated room previews.
Cathedral Gray vs Thames Fog in Real Spaces
2 real rooms side by side. Cathedral Gray 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.
Living Room
Living rooms test a color across a full range of conditions — morning sun, afternoon shade, and evening lamp light all shift how both of these read. At this scale, the choice between them becomes clear in a way that a swatch alone can't communicate.
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. The distinction reads clearly at room scale, making the choice between them concrete.
Color Details
Cathedral Gray vs Thames Fog Simulated Comparison
5 simulated room previews — drag the slider on each to see Cathedral Gray 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 Cathedral Gray comparisons
See how Cathedral Gray stacks up against other well-photographed colors across different brands and tones.
