RAL 820-M vs Gray Shingle
RAL 820-M is a RAL Effect color while Gray Shingle comes from Sherwin-Williams. These are both greys, so the question isn't which hue to choose — it's where within grey to land. With LRVs of 29 and 29, they'll behave almost identically in terms of how much light they reflect back into a room. With a ΔE of 0.9, the difference is subtle — you'd need them side by side to reliably tell them apart. Below you'll find 3 real-room photo comparisons where both colors appear side by side, plus 5 simulated room previews.
RAL 820-M vs Gray Shingle in Real Spaces
3 real rooms side by side. RAL 820-M and Gray Shingle 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
Living rooms test a color across a full range of conditions — morning sun, afternoon shade, and evening lamp light all shift how both of these read. 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
At full exterior scale, the difference between these two colors becomes much easier to judge than from a small chip. The two are close enough that the choice comes down to finer qualities — undertone, texture, what the color sits next to.
Kitchen Cabinets
On cabinetry, undertone and temperature become more pronounced against countertops and hardware. The two are close enough that the choice comes down to finer qualities — undertone, texture, what the color sits next to.
Color Details
RAL 820-M vs Gray Shingle Simulated Comparison
5 simulated room previews — drag the slider on each to see RAL 820-M on one side and Gray Shingle 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 RAL 820-M comparisons
See how RAL 820-M stacks up against other well-photographed colors across different brands and tones.
