Portsmouth vs Thames Fog
Portsmouth is a Sherwin-Williams color while Thames Fog comes from Valspar. Portsmouth reads as blue-grey, while Thames Fog reads as grey — two distinct hue families, not close cousins. At LRV 27 vs 22, Thames Fog will read as the brighter of the two — a 5-point gap that matters most in north-facing or low-light rooms. At ΔE 9.9, the difference is perceptible but not dramatic — the two can work harmoniously in the same space. Below you'll find 1 real-room photo comparison where both colors appear side by side, plus 5 simulated room previews.
Portsmouth vs Thames Fog in Real Spaces
1 real room side by side. Portsmouth 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.
Color Details
Portsmouth vs Thames Fog Simulated Comparison
5 simulated room previews — drag the slider on each to see Portsmouth 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 Portsmouth comparisons
See how Portsmouth stacks up against other well-photographed colors across different brands and tones.
