Purbeck Stone vs RAL 770-5
Purbeck Stone is a Farrow & Ball color while RAL 770-5 comes from RAL Effect. These are both greige-greys, so the question isn't which hue to choose — it's where within greige-grey to land. At LRV 52 vs 43, Purbeck Stone will read as the brighter of the two — a 9-point gap that matters most in north-facing or low-light rooms. At ΔE 6.6, the difference is perceptible but not dramatic — the two can work harmoniously in the same space. Below you'll find 2 real-room photo comparisons where both colors appear side by side, plus 5 simulated room previews.
Purbeck Stone vs RAL 770-5 in Real Spaces
2 real rooms side by side. Purbeck Stone and RAL 770-5 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.
Kitchen
Kitchen lighting tends to be bright and directional, which sharpens contrast and makes undertone differences more apparent. The LRV gap is large enough that Purbeck Stone will make the room feel meaningfully brighter than RAL 770-5 would.
Bathroom
Bathrooms amplify color — the enclosed space and reflective surfaces make what reads subtle elsewhere feel more present here. The LRV gap is large enough that Purbeck Stone will make the room feel meaningfully brighter than RAL 770-5 would.
Color Details
Purbeck Stone vs RAL 770-5 Simulated Comparison
5 simulated room previews — drag the slider on each to see Purbeck Stone on one side and RAL 770-5 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 Purbeck Stone comparisons
See how Purbeck Stone stacks up against other well-photographed colors across different brands and tones.
