Brewster Gray vs RAL 820-3
Brewster Gray (Benjamin Moore) and RAL 820-3 (RAL Effect) come from different manufacturers. Hue-wise, Brewster Gray belongs to the blue-grey family and RAL 820-3 to the grey family. Their light reflectance values are nearly the same — 30 vs 29 — 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 3 real-room photo comparisons where both colors appear side by side, plus 5 simulated room previews.
Brewster Gray vs RAL 820-3 in Real Spaces
3 real rooms side by side. Brewster Gray and RAL 820-3 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
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.
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
Brewster Gray vs RAL 820-3 Simulated Comparison
5 simulated room previews — drag the slider on each to see Brewster Gray on one side and RAL 820-3 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 Brewster Gray comparisons
See how Brewster Gray stacks up against other well-photographed colors across different brands and tones.
