Grey Blue vs RAL 820-6
Grey Blue is a RAL Classic color while RAL 820-6 comes from RAL Effect. Both sit in the blue-grey family, which is useful context if you're narrowing within a single hue direction. With LRVs of 7 and 7, they'll behave almost identically in terms of how much light they reflect back into a room. With a ΔE of 1.8, the difference is subtle — you'd need them side by side to reliably tell them apart. Below you'll find 2 real-room photo comparisons where both colors appear side by side, plus 5 simulated room previews.
Grey Blue vs RAL 820-6 in Real Spaces
2 real rooms side by side. Grey Blue and RAL 820-6 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.
Bedroom
Bedroom walls are often seen under warm artificial light, a context that shifts both colors from how they look on a chip. The two are close enough that the choice comes down to finer qualities — undertone, texture, what the color sits next to.
Color Details
Grey Blue vs RAL 820-6 Simulated Comparison
5 simulated room previews — drag the slider on each to see Grey Blue on one side and RAL 820-6 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 Grey Blue comparisons
See how Grey Blue stacks up against other well-photographed colors across different brands and tones.
