Pewter Cast vs Thames Fog
Where Pewter Cast belongs to Sherwin-Williams's range, Thames Fog is a Valspar color. These are both greys, so the question isn't which hue to choose — it's where within grey to land. Pewter Cast (LRV 31) reflects noticeably more light than Thames Fog (LRV 27), a difference of 4 points that becomes especially apparent in rooms with limited natural light. The ΔE 6.4 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.
Pewter Cast vs Thames Fog in Real Spaces
2 real rooms side by side. Pewter Cast 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
The context that matters most in a bedroom is how a color reads under a bedside lamp at night, not under noon daylight. Pewter Cast reads slightly lighter here — a subtle but real difference in how open the space feels.
Bathroom
Bathrooms are one of the few spaces where you're genuinely enclosed by the paint color, which makes the choice between these two more consequential. Pewter Cast reads slightly lighter here — a subtle but real difference in how open the space feels.
Color Details
Pewter Cast vs Thames Fog Simulated Comparison
5 simulated room previews — drag the slider on each to see Pewter Cast 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 Pewter Cast comparisons
See how Pewter Cast stacks up against other well-photographed colors across different brands and tones.
