London Fog vs Onyx
London Fog and Onyx come from the same Benjamin Moore collection. London Fog reads as greige-grey, while Onyx reads as grey — two distinct hue families, not close cousins. The 51-point LRV gap — 56 for London Fog vs 5 for Onyx — means London Fog will open up a space more effectively. Both share a red character, which means they'll respond to light and surrounding materials in similar ways. A ΔE of 58.8 puts these firmly in different territory — two distinct design choices rather than close alternatives. Below you'll find 2 real-room photo comparisons where both colors appear side by side, plus 5 simulated room previews.
London Fog vs Onyx in Real Spaces
2 real rooms side by side. Seeing London Fog and Onyx in actual rooms makes the difference concrete; browse the spaces below to get a feel for how each color lives on a wall.
Bathroom
Small bathrooms intensify color. A shade that seems quiet in a larger room can feel immersive when you're surrounded by it on four walls. London 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
Cabinet color is always seen in context — against countertops, backsplash, and hardware — which amplifies undertone differences that might disappear on a plain wall. London Fog returns significantly more light to the room — in a smaller or darker space, that difference in perceived brightness is hard to miss.
Color Details
London Fog vs Onyx Simulated Comparison
5 simulated room previews — drag the slider on each to see London Fog on one side and Onyx 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 London Fog comparisons
See how London Fog stacks up against other well-photographed colors across different brands and tones.
Ammonite reflects far more light (LRV 69 vs 56), opening up a space where London Fog encloses it.
At LRV 83 vs 56, White Dove is decisively the brighter choice.
At LRV 56 vs 6, London Fog is decisively the brighter choice.
London Fog reads slightly lighter (LRV 56 vs 52), a gap that shows most in low-lit rooms.
London Fog reflects far more light (LRV 56 vs 30), opening up a space where Evergreen Fog encloses it.
A 5-point LRV gap (56 vs 52) makes London Fog the marginally brighter of the two.
Agreeable Gray reads slightly lighter (LRV 60 vs 56), a gap that shows most in low-lit rooms.
Their light reflectance is nearly identical (LRV 58 vs 56), so neither reads brighter in a room.
At LRV 56 vs 27, London Fog is decisively the brighter choice.
London Fog reflects far more light (LRV 56 vs 43), opening up a space where French Gray encloses it.
London Fog reflects far more light (LRV 56 vs 4), opening up a space where Naval encloses it.
Their light reflectance is nearly identical (LRV 56 vs 55), so neither reads brighter in a room.
At LRV 56 vs 13, London Fog is decisively the brighter choice.
At LRV 56 vs 44, London Fog is decisively the brighter choice.
Pure White reflects far more light (LRV 84 vs 56), opening up a space where London Fog encloses it.
London Fog reflects far more light (LRV 56 vs 21), opening up a space where Artichoke encloses it.
A 9-point LRV gap (66 vs 56) makes Balboa Mist the marginally brighter of the two.
At LRV 74 vs 56, Shoji White is decisively the brighter choice.
At LRV 83 vs 56, Snowbound is decisively the brighter choice.
London Fog reads slightly lighter (LRV 56 vs 51), a gap that shows most in low-lit rooms.
At LRV 56 vs 12, London Fog is decisively the brighter choice.
At LRV 56 vs 8, London Fog is decisively the brighter choice.
A 12-point LRV gap (68 vs 56) makes Skimming Stone the marginally brighter of the two.
London Fog reflects far more light (LRV 56 vs 41), opening up a space where Dix Blue encloses it.
At LRV 56 vs 12, London Fog is decisively the brighter choice.
A 11-point LRV gap (56 vs 45) makes London Fog the marginally brighter of the two.
London Fog reflects far more light (LRV 56 vs 31), opening up a space where Pale Green encloses it.