Dress Blues vs Thames Fog
Where Dress Blues belongs to Sherwin-Williams's range, Thames Fog is a Valspar color. Dress Blues 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 Dress Blues (LRV 5), a difference of 22 points that becomes especially apparent in rooms with limited natural light. With a ΔE of 41.8, 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.
Dress Blues vs Thames Fog in Real Spaces
3 real rooms side by side. Seeing Dress Blues 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 Dress Blues 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. Thames Fog reflects noticeably more light off the walls, making the space read more open than Dress Blues.
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. Thames Fog reflects noticeably more light off the walls, making the space read more open than Dress Blues.
Color Details
Dress Blues vs Thames Fog Simulated Comparison
5 simulated room previews — drag the slider on each to see Dress Blues 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 Dress Blues comparisons
See how Dress Blues stacks up against other well-photographed colors across different brands and tones.
