Smooth Stone vs Thames Fog
Where Smooth Stone belongs to Sherwin-Williams's range, Thames Fog is a Valspar color. Smooth Stone reads as greige-grey, while Thames Fog reads as grey — two distinct hue families, not close cousins. Smooth Stone (LRV 37) reflects noticeably more light than Thames Fog (LRV 27), a difference of 9 points that becomes especially apparent in rooms with limited natural light. The ΔE 8.3 gap is real but not dramatic — close enough to use together, distinct enough to matter as a choice. Below, 5 simulated room previews show how each color reads at scale — real-room photos will be added as they become available.
Color Details
Smooth Stone vs Thames Fog Simulated Comparison
5 simulated room previews — drag the slider on each to see Smooth Stone 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 Smooth Stone comparisons
See how Smooth Stone stacks up against other well-photographed colors across different brands and tones.
