Astronomical vs Black grey
Where Astronomical belongs to Behr's range, Black grey is a RAL Classic color. Hue-wise, Astronomical belongs to the grey family and Black grey to the blue-grey family. They have nearly identical light reflectance values (7 vs 6), so they'll read as similarly Dark in most lighting conditions. With a ΔE of 11.1, the contrast is hard to miss. These aren't variations on a theme — they're two different answers to the same question. Below, 5 simulated room previews show how each color reads at scale — real-room photos will be added as they become available.
Color Details
Astronomical vs Black grey Simulated Comparison
5 simulated room previews — drag the slider on each to see Astronomical on one side and Black grey 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 Astronomical comparisons
See how Astronomical stacks up against other well-photographed colors across different brands and tones.
