Portland Stone - Dark vs RAL 780-M
Where Portland Stone - Dark belongs to Little Greene's range, RAL 780-M is a RAL Effect color. Portland Stone - Dark reads as beige-greige, while RAL 780-M reads as beige — two distinct hue families, not close cousins. RAL 780-M (LRV 35) reflects noticeably more light than Portland Stone - Dark (LRV 33), a difference of 3 points that becomes especially apparent in rooms with limited natural light. The ΔE 8.7 gap is real but not dramatic — close enough to use together, distinct enough to matter as a choice. Below you'll find 1 real-room photo comparison where both colors appear side by side, plus 5 simulated room previews.
Portland Stone - Dark vs RAL 780-M in Real Spaces
1 real room side by side. Portland Stone - Dark and RAL 780-M 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. Side by side like this, the difference is easy to read — which is exactly why seeing them in a real space is more useful than comparing chips.
Color Details
Portland Stone - Dark vs RAL 780-M Simulated Comparison
5 simulated room previews — drag the slider on each to see Portland Stone - Dark on one side and RAL 780-M 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 Portland Stone - Dark comparisons
See how Portland Stone - Dark stacks up against other well-photographed colors across different brands and tones.
Ammonite reflects far more light (LRV 69 vs 33), opening up a space where Portland Stone - Dark encloses it.
At LRV 83 vs 33, White Dove is decisively the brighter choice.
At LRV 33 vs 6, Portland Stone - Dark is decisively the brighter choice.
Purbeck Stone reflects far more light (LRV 52 vs 33), opening up a space where Portland Stone - Dark encloses it.
With LRVs of 33 and 30, the two reflect almost the same amount of light.
At LRV 52 vs 33, Mizzle is decisively the brighter choice.
Agreeable Gray reflects far more light (LRV 60 vs 33), opening up a space where Portland Stone - Dark encloses it.
At LRV 58 vs 33, Accessible Beige is decisively the brighter choice.
A 6-point LRV gap (33 vs 27) makes Portland Stone - Dark the marginally brighter of the two.
French Gray reads slightly lighter (LRV 43 vs 33), a gap that shows most in low-lit rooms.
Portland Stone - Dark reflects far more light (LRV 33 vs 4), opening up a space where Naval encloses it.
At LRV 55 vs 33, Tranquil Dawn is decisively the brighter choice.
At LRV 33 vs 13, Portland Stone - Dark is decisively the brighter choice.
A 11-point LRV gap (44 vs 33) makes Hardwick White the marginally brighter of the two.
Pure White reflects far more light (LRV 84 vs 33), opening up a space where Portland Stone - Dark encloses it.
Portland Stone - Dark reads slightly lighter (LRV 33 vs 21), a gap that shows most in low-lit rooms.
At LRV 66 vs 33, Balboa Mist is decisively the brighter choice.
At LRV 74 vs 33, Shoji White is decisively the brighter choice.
At LRV 83 vs 33, Snowbound is decisively the brighter choice.
Pigeon reflects far more light (LRV 51 vs 33), opening up a space where Portland Stone - Dark encloses it.
At LRV 33 vs 12, Portland Stone - Dark is decisively the brighter choice.
At LRV 33 vs 8, Portland Stone - Dark is decisively the brighter choice.
At LRV 68 vs 33, Skimming Stone is decisively the brighter choice.
Dix Blue reads slightly lighter (LRV 41 vs 33), a gap that shows most in low-lit rooms.
At LRV 33 vs 12, Portland Stone - Dark is decisively the brighter choice.
At LRV 45 vs 33, Saybrook Sage is decisively the brighter choice.
With LRVs of 33 and 31, the two reflect almost the same amount of light.