Gray Flannel vs RAL 820-5
Gray Flannel (PPG) and RAL 820-5 (RAL Effect) come from different manufacturers. Hue-wise, Gray Flannel belongs to the grey family and RAL 820-5 to the blue-grey family. Their light reflectance values are nearly the same — 10 vs 9 — so neither will read significantly brighter or darker than the other. A ΔE of 2.6 puts them in subtle territory — distinguishable in direct comparison, less so from across a room. Below you'll find 5 real-room photo comparisons where both colors appear side by side, plus 5 simulated room previews.
Gray Flannel vs RAL 820-5 in Real Spaces
5 real rooms side by side. Gray Flannel and RAL 820-5 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.
Living Room
A living room wall sees more varied light than almost any other surface in the house, which makes the choice between these two more nuanced than a chip suggests. At this scale the difference is subtle — you'd need them side by side, as shown here, to reliably tell them apart.
Bedroom
Bedrooms are typically lit with warmer, lower light than the rest of the house — a condition that flatters warm tones and deepens cool ones. In photos like these you're seeing the difference at its most direct. In a finished room, the distinction is there but not dramatic.
Kitchen
Kitchens often have the harshest, most revealing light in the house — under-cabinet LEDs and overhead fixtures that strip away subtlety. In photos like these you're seeing the difference at its most direct. In a finished room, the distinction is there but not dramatic.
Bathroom
Small bathrooms intensify color. A shade that seems quiet in a larger room can feel immersive when you're surrounded by it on four walls. In photos like these you're seeing the difference at its most direct. In a finished room, the distinction is there but not dramatic.
House
A full exterior is the most demanding test for a paint color — scale and outdoor light both amplify differences that seem small on a swatch. In photos like these you're seeing the difference at its most direct. In a finished room, the distinction is there but not dramatic.
Color Details
Gray Flannel vs RAL 820-5 Simulated Comparison
5 simulated room previews — drag the slider on each to see Gray Flannel on one side and RAL 820-5 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 Gray Flannel comparisons
See how Gray Flannel stacks up against other well-photographed colors across different brands and tones.
At LRV 69 vs 10, Ammonite is decisively the brighter choice.
White Dove reflects far more light (LRV 83 vs 10), opening up a space where Gray Flannel encloses it.
Gray Flannel reads slightly lighter (LRV 10 vs 6), a gap that shows most in low-lit rooms.
At LRV 52 vs 10, Purbeck Stone is decisively the brighter choice.
At LRV 30 vs 10, Evergreen Fog is decisively the brighter choice.
Mizzle reflects far more light (LRV 52 vs 10), opening up a space where Gray Flannel encloses it.
At LRV 60 vs 10, Agreeable Gray is decisively the brighter choice.
Accessible Beige reflects far more light (LRV 58 vs 10), opening up a space where Gray Flannel encloses it.
Denim Drift reflects far more light (LRV 27 vs 10), opening up a space where Gray Flannel encloses it.
At LRV 43 vs 10, French Gray is decisively the brighter choice.
A 6-point LRV gap (10 vs 4) makes Gray Flannel the marginally brighter of the two.
Tranquil Dawn reflects far more light (LRV 55 vs 10), opening up a space where Gray Flannel encloses it.
Bancha reads slightly lighter (LRV 13 vs 10), a gap that shows most in low-lit rooms.
Hardwick White reflects far more light (LRV 44 vs 10), opening up a space where Gray Flannel encloses it.
At LRV 84 vs 10, Pure White is decisively the brighter choice.
A 11-point LRV gap (21 vs 10) makes Artichoke the marginally brighter of the two.
Balboa Mist reflects far more light (LRV 66 vs 10), opening up a space where Gray Flannel encloses it.
Shoji White reflects far more light (LRV 74 vs 10), opening up a space where Gray Flannel encloses it.
Snowbound reflects far more light (LRV 83 vs 10), opening up a space where Gray Flannel encloses it.
At LRV 51 vs 10, Pigeon is decisively the brighter choice.
With LRVs of 12 and 10, the two reflect almost the same amount of light.
With LRVs of 10 and 8, the two reflect almost the same amount of light.
Skimming Stone reflects far more light (LRV 68 vs 10), opening up a space where Gray Flannel encloses it.
At LRV 41 vs 10, Dix Blue is decisively the brighter choice.
With LRVs of 12 and 10, the two reflect almost the same amount of light.
Saybrook Sage reflects far more light (LRV 45 vs 10), opening up a space where Gray Flannel encloses it.
At LRV 31 vs 10, Pale Green is decisively the brighter choice.