Polished Slate vs Thames Fog
Where Polished Slate belongs to Benjamin Moore's range, Thames Fog is a Valspar color. Polished Slate reads as blue, while Thames Fog reads as grey — two distinct hue families, not close cousins. Thames Fog (LRV 27) reflects noticeably more light than Polished Slate (LRV 15), a difference of 13 points that becomes especially apparent in rooms with limited natural light. With a ΔE of 20.7, the contrast is hard to miss. These aren't variations on a theme — they're two different answers to the same question. Below, 5 simulated room previews show how each color reads at scale — real-room photos will be added as they become available.
Color Details
Polished Slate vs Thames Fog Simulated Comparison
5 simulated room previews — drag the slider on each to see Polished Slate 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 Polished Slate comparisons
See how Polished Slate stacks up against other well-photographed colors across different brands and tones.
