Granite Boulder vs Purbeck Stone
Where Granite Boulder belongs to Behr's range, Purbeck Stone is a Farrow & Ball color. Both sit in the greige-grey family, which is useful context if you're narrowing within a single hue direction. Purbeck Stone (LRV 52) reflects noticeably more light than Granite Boulder (LRV 42), a difference of 10 points that becomes especially apparent in rooms with limited natural light. Granite Boulder runs yellow while Purbeck Stone is decidedly warm, which means they'll respond very differently to warm vs cool light sources. The ΔE 6.4 gap is real but not dramatic — close enough to use together, distinct enough to matter as a choice. Below you'll find 2 real-room photo comparisons where both colors appear side by side, plus 5 simulated room previews.
Granite Boulder vs Purbeck Stone in Real Spaces
2 real rooms side by side. Granite Boulder and Purbeck Stone are close enough that the difference can be hard to judge from a chip alone — these photos show how each reads at scale, across different spaces and lighting conditions.
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 Purbeck Stone will make the room feel meaningfully brighter than Granite Boulder would.
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. Purbeck Stone reflects noticeably more light off the walls, making the space read more open than Granite Boulder.
Color Details
Granite Boulder vs Purbeck Stone Simulated Comparison
5 simulated room previews — drag the slider on each to see Granite Boulder on one side and Purbeck Stone 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 Granite Boulder comparisons
See how Granite Boulder stacks up against other well-photographed colors across different brands and tones.
At LRV 69 vs 42, Ammonite is decisively the brighter choice.
White Dove reflects far more light (LRV 83 vs 42), opening up a space where Granite Boulder encloses it.
Granite Boulder reflects far more light (LRV 42 vs 6), opening up a space where Iron Ore encloses it.
A 12-point LRV gap (42 vs 30) makes Granite Boulder the marginally brighter of the two.
Mizzle reads slightly lighter (LRV 52 vs 42), a gap that shows most in low-lit rooms.
At LRV 60 vs 42, Agreeable Gray is decisively the brighter choice.
Accessible Beige reflects far more light (LRV 58 vs 42), opening up a space where Granite Boulder encloses it.
Granite Boulder reflects far more light (LRV 42 vs 27), opening up a space where Denim Drift encloses it.
Their light reflectance is nearly identical (LRV 43 vs 42), so neither reads brighter in a room.
At LRV 42 vs 4, Granite Boulder is decisively the brighter choice.
Tranquil Dawn reflects far more light (LRV 55 vs 42), opening up a space where Granite Boulder encloses it.
Granite Boulder reflects far more light (LRV 42 vs 13), opening up a space where Bancha encloses it.
With LRVs of 44 and 42, the two reflect almost the same amount of light.
At LRV 84 vs 42, Pure White is decisively the brighter choice.
At LRV 42 vs 21, Granite Boulder is decisively the brighter choice.
Balboa Mist reflects far more light (LRV 66 vs 42), opening up a space where Granite Boulder encloses it.
Shoji White reflects far more light (LRV 74 vs 42), opening up a space where Granite Boulder encloses it.
Snowbound reflects far more light (LRV 83 vs 42), opening up a space where Granite Boulder encloses it.
A 8-point LRV gap (51 vs 42) makes Pigeon the marginally brighter of the two.
Granite Boulder reflects far more light (LRV 42 vs 12), opening up a space where Pewter Green encloses it.
Granite Boulder reflects far more light (LRV 42 vs 8), opening up a space where Duck Green encloses it.
Skimming Stone reflects far more light (LRV 68 vs 42), opening up a space where Granite Boulder encloses it.
Their light reflectance is nearly identical (LRV 42 vs 41), so neither reads brighter in a room.
Granite Boulder reflects far more light (LRV 42 vs 12), opening up a space where Vintage Vogue encloses it.
Saybrook Sage reads slightly lighter (LRV 45 vs 42), a gap that shows most in low-lit rooms.
A 11-point LRV gap (42 vs 31) makes Granite Boulder the marginally brighter of the two.
At LRV 42 vs 7, Granite Boulder is decisively the brighter choice.