London Stone → Benjamin Moore
The closest Benjamin Moore matches for Farrow & Ball London Stone (No.6), ranked by perceptual color distance.
Finding a Benjamin Moore Equivalent for London Stone
If you love Farrow & Ball London Stone but need a Benjamin Moore alternative, you are not alone. This is one of the most common cross-brand paint matching searches, whether you are working with a painter who prefers Benjamin Moore, your local store does not carry Farrow & Ball, or you simply want to compare prices across brands before committing.
London Stone (No.6) is a dark taupe with warm london stone undertones. A warm, earthy taupe named for the ancient stone of London. Rich and grounding, darker than Mouse's Back. The color of centuries-old masonry. To find a good Benjamin Moore match, we need a color that captures not just the right depth (LRV 17) but also that specific undertone character. That is where Delta E color science comes in.
We calculated the perceptual color distance between London Stone and every Benjamin Moore color using the CIE2000 Delta E formula, which measures how different two colors look to the human eye. A Delta E under 2 means most people cannot tell the colors apart. Between 2 and 4, you might notice a difference in certain lighting. Above 5, the difference is clearly visible side by side.
Honestly, Benjamin Moore does not have a perfect equivalent for London Stone. The closest option is Iron Mountain (2134-30) with a Delta E of 5.8, but at that distance the difference will be visible. Iron Mountain is greener. London Stone is browner. If getting this exact color is critical, you may want to explore custom color matching at a Benjamin Moore store.
Benjamin Moore Matches for London Stone
Iron Mountain is greener. London Stone is browner.
| London Stone | Iron Mountain | |
|---|---|---|
| LRV | 17 | 14.79 |
| Hex | #8B8378 | #767671 |
| Undertone | Warm London Stone | Warm Charcoal-Green |
| Family | Taupe | Gray |
Undertone Comparison
London Stone has warm london stone undertones. A warm, earthy taupe named for the ancient stone of London. Rich and grounding, darker than Mouse's Back. The color of centuries-old masonry.
Iron Mountain has warm charcoal-green undertones. A dark, warm gray with subtle green undertones. Lighter than Wrought Iron, darker than Chelsea Gray. A versatile dark neutral.
The undertone difference is worth paying attention to. While they are close in overall appearance, the different undertones mean they may diverge in certain lighting. London Stone's warm london stone quality may read differently than Iron Mountain's warm charcoal-green character, especially in rooms with strong directional light or colored accents that could pull out one undertone more than the other. Test a sample in your specific room before committing.
How These Colors Behave in Different Lighting
London Stone in Your Room
Warm and grounding at a substantial depth. In bright rooms, the earthy warmth shows. In dim rooms, cozy and atmospheric.
Iron Mountain in Your Room
In bright light, the green lean is visible. In dim rooms, it reads as a solid dark gray. Works as a softer alternative to black.
LRV and Brightness
London Stone has an LRV of 17, while Iron Mountain has an LRV of 14.79. These two colors reflect a very similar amount of light, so you should not notice a significant difference in room brightness when switching between them. The room will feel approximately the same in terms of light and space, which makes this a smoother transition.
Best Rooms for London Stone
Farrow & Ball recommends London Stone for: living room, dining room, accent wall, study, office. With an LRV of 17, this is a dark color that absorbs more light than it reflects. It makes a bold statement and works beautifully on accent walls, front doors, exterior trim, and features where drama is the goal. In a full room, make sure you have good lighting and bright white trim for contrast.
Iron Mountain is recommended for: accent wall, exterior, front door, cabinets, office. The recommended applications differ slightly between brands, but the color's properties should work in the same rooms regardless of which brand you choose. Trust the LRV and undertone data more than the specific room suggestions, and always test in your actual space.
London Stone in Other Brands
Looking for London Stone equivalents in other brands besides Benjamin Moore? We have matches across all major paint brands.
Frequently Asked Questions
The closest Benjamin Moore match for London Stone (No.6) is Iron Mountain (2134-30) with a Delta E of 5.8, which rates as a "approximate" match. Iron Mountain is greener. London Stone is browner. Delta E measures perceptual color distance on a scale where under 2 means nearly identical, 2 to 4 means close with subtle differences, and over 5 means clearly noticeable.
No, they are not identical. London Stone is a Farrow & Ball color with warm london stone undertones and an LRV of 17. Iron Mountain is a Benjamin Moore color with warm charcoal-green undertones and an LRV of 14.79. With a Delta E of 5.8, you will likely notice a difference, especially in bright or direct lighting. Paint formulations differ between brands, so even colors with similar values can look slightly different due to pigment concentration, binders, and finish.
With a Delta E of 5.8, the difference is enough that they should not be used on adjacent walls in the same room. You can use them in separate rooms of the same house, but be aware that walking from one room to the other may reveal the difference, especially if the rooms have similar lighting. For the most consistent look, pick one brand for all connected living spaces and reserve the other brand for visually separate rooms like bathrooms or bedrooms behind closed doors.
There are several practical reasons to look for a Benjamin Moore equivalent. Price differences between brands can be significant on large projects. Availability matters if your nearest paint store or home center specializes in Benjamin Moore. Some painters have strong preferences for one brand's formula based on coverage, dry time, or workability. And if you are touching up existing Benjamin Moore work, matching within the same brand gives you the best consistency for seamless results.
Match calculations use Delta E (CIE2000) computed from Lab color space conversion. Color data sourced from manufacturer specifications. Last reviewed: March 22, 2026.