Mount Etna vs Thames Fog
Where Mount Etna belongs to Sherwin-Williams's range, Thames Fog is a Valspar color. Hue-wise, Mount Etna belongs to the blue-grey family and Thames Fog to the grey family. Thames Fog (LRV 27) reflects noticeably more light than Mount Etna (LRV 6), a difference of 21 points that becomes especially apparent in rooms with limited natural light. With a ΔE of 31.6, the contrast is hard to miss. These aren't variations on a theme — they're two different answers to the same question. Below you'll find 3 real-room photo comparisons where both colors appear side by side, plus 5 simulated room previews.
Mount Etna vs Thames Fog in Real Spaces
3 real rooms side by side. Seeing Mount Etna and Thames Fog in actual rooms makes the difference concrete; browse the spaces below to get a feel for how each color lives on a wall.
Living Room
In a living room, color works across both daylight and evening light — the same wall can read very differently at noon and at 8pm. The LRV gap is large enough that Thames Fog will make the room feel meaningfully brighter than Mount Etna would.
Dining Room
A dining room lit by a dimmed pendant or candles is one of the most forgiving environments for paint — warm light softens almost everything. Thames Fog returns significantly more light to the room — in a smaller or darker space, that difference in perceived brightness is hard to miss.
Kitchen Cabinets
Kitchen cabinets are constantly compared against adjacent materials, which means subtle differences between these two become much more visible. Thames Fog reflects noticeably more light off the walls, making the space read more open than Mount Etna.
Color Details
Mount Etna vs Thames Fog Simulated Comparison
5 simulated room previews — drag the slider on each to see Mount Etna 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 Mount Etna comparisons
See how Mount Etna stacks up against other well-photographed colors across different brands and tones.
