Mega Greige vs Thames Fog
Where Mega Greige belongs to Sherwin-Williams's range, Thames Fog is a Valspar color. Mega Greige reads as greige-grey, while Thames Fog reads as grey — two distinct hue families, not close cousins. Mega Greige (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 9.2 gap is real but not dramatic — close enough to use together, distinct enough to matter as a choice. Below you'll find 4 real-room photo comparisons where both colors appear side by side, plus 5 simulated room previews.
Mega Greige vs Thames Fog in Real Spaces
4 real rooms side by side. Mega Greige 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.
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 Mega Greige will make the room feel meaningfully brighter than Thames Fog would.
Bedroom
The context that matters most in a bedroom is how a color reads under a bedside lamp at night, not under noon daylight. Mega Greige reflects noticeably more light off the walls, making the space read more open than Thames Fog.
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. Mega Greige reflects noticeably more light off the walls, making the space read more open than Thames Fog.
Kitchen Cabinets
Kitchen cabinets are constantly compared against adjacent materials, which means subtle differences between these two become much more visible. Mega Greige reflects noticeably more light off the walls, making the space read more open than Thames Fog.
Color Details
Mega Greige vs Thames Fog Simulated Comparison
5 simulated room previews — drag the slider on each to see Mega Greige 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 Mega Greige comparisons
See how Mega Greige stacks up against other well-photographed colors across different brands and tones.
