Underground → Farrow & Ball
The closest Farrow & Ball matches for Behr Underground (PPU18-02), ranked by perceptual color distance.
Finding a Farrow & Ball Equivalent for Underground
If you love Behr Underground but need a Farrow & Ball 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 Farrow & Ball, your local store does not carry Behr, or you simply want to compare prices across brands before committing.
Underground (PPU18-02) is a dark gray with warm dark charcoal undertones. A warm, dark charcoal-brown. Deeper than Off Broadway, lighter than Granite Boulder. The warm brown gives it an earthy, organic quality at a very dark depth. To find a good Farrow & Ball match, we need a color that captures not just the right depth (LRV 10) but also that specific undertone character. That is where Delta E color science comes in.
We calculated the perceptual color distance between Underground and every Farrow & Ball 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.
The good news: there is a strong Farrow & Ball match for Underground. Down Pipe (No.26) comes in with a Delta E of 2, which puts it in the "excellent match" range. Down Pipe is the closest F&B option. Very close match.
Farrow & Ball Matches for Underground
Down Pipe is the closest F&B option. Very close match.
| Underground | Down Pipe | |
|---|---|---|
| LRV | 10 | 10 |
| Hex | #65625E | #5F5D58 |
| Undertone | Warm Dark Charcoal | Warm Green-Gray |
| Family | Gray | Gray |
Undertone Comparison
Underground has warm dark charcoal undertones. A warm, dark charcoal-brown. Deeper than Off Broadway, lighter than Granite Boulder. The warm brown gives it an earthy, organic quality at a very dark depth.
Down Pipe has warm green-gray undertones. A deep, warm dark gray with subtle green undertones. Softer and warmer than Railings, less blue than Off-Black. A classic F&B 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. Underground's warm dark charcoal quality may read differently than Down Pipe's warm green-gray 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
Underground in Your Room
In bright light, the warm brown undertone is visible. In dim rooms, it reads as a warm near-black. A strong, earthy dark neutral.
Down Pipe in Your Room
In bright light, the warm green character is visible. In dim rooms, it reads as a sophisticated dark charcoal. Less dramatic than black but with real presence.
LRV and Brightness
Underground has an LRV of 10, while Down Pipe has an LRV of 10. 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 Underground
Behr recommends Underground for: accent wall, front door, cabinets, exterior trim, shutters. With an LRV of 10, 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.
Down Pipe is recommended for: front door, accent wall, cabinets, exterior, powder room. 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.
Underground in Other Brands
Looking for Underground equivalents in other brands besides Farrow & Ball? We have matches across all major paint brands.
Frequently Asked Questions
The closest Farrow & Ball match for Underground (PPU18-02) is Down Pipe (No.26) with a Delta E of 2, which rates as a "excellent match" match. Down Pipe is the closest F&B option. Very close match. 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. Underground is a Behr color with warm dark charcoal undertones and an LRV of 10. Down Pipe is a Farrow & Ball color with warm green-gray undertones and an LRV of 10. With a Delta E of 2, these are extremely close and most people will not spot the difference on a wall. 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 2, these colors are close enough to use in separate rooms of the same house without a jarring difference. However, avoid painting them on adjacent walls in the same room, as even subtle differences become apparent at a hard edge where two paints meet. For the smoothest result, use one brand consistently within each connected space and reserve the other brand for rooms that are visually separated.
There are several practical reasons to look for a Farrow & Ball equivalent. Price differences between brands can be significant on large projects. Availability matters if your nearest paint store or home center specializes in Farrow & Ball. Some painters have strong preferences for one brand's formula based on coverage, dry time, or workability. And if you are touching up existing Farrow & Ball 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.