Dark Basalt vs Thames Fog
Where Dark Basalt belongs to Benjamin Moore'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. Thames Fog (LRV 27) reflects noticeably more light than Dark Basalt (LRV 5), a difference of 22 points that becomes especially apparent in rooms with limited natural light. With a ΔE of 37.7, 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
Dark Basalt vs Thames Fog Simulated Comparison
5 simulated room previews — drag the slider on each to see Dark Basalt 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 Dark Basalt comparisons
See how Dark Basalt stacks up against other well-photographed colors across different brands and tones.
