Fortitude vs Thames Fog
Where Fortitude belongs to Sherwin-Williams's range, Thames Fog is a Valspar color. Both sit in the grey family, which is useful context if you're narrowing within a single hue direction. Fortitude (LRV 56) reflects noticeably more light than Thames Fog (LRV 27), a difference of 29 points that becomes especially apparent in rooms with limited natural light. With a ΔE of 21.0, 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 1 real-room photo comparison where both colors appear side by side, plus 5 simulated room previews.
Fortitude vs Thames Fog in Real Spaces
1 real room side by side. Seeing Fortitude 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.
Bedroom
The context that matters most in a bedroom is how a color reads under a bedside lamp at night, not under noon daylight. Fortitude reflects noticeably more light off the walls, making the space read more open than Thames Fog.
Color Details
Fortitude vs Thames Fog Simulated Comparison
5 simulated room previews — drag the slider on each to see Fortitude 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 Fortitude comparisons
See how Fortitude stacks up against other well-photographed colors across different brands and tones.
