Astronomical vs Cement grey
Astronomical is a Behr color while Cement grey comes from RAL Classic. These are both greys, so the question isn't which hue to choose — it's where within grey to land. At LRV 24 vs 7, Cement grey will read as the brighter of the two — a 17-point gap that matters most in north-facing or low-light rooms. At ΔE 23.5, these are genuinely distinct colors — a strong contrast if used together, or a meaningful choice between two different directions. Below you'll find 1 real-room photo comparison where both colors appear side by side, plus 5 simulated room previews.
Astronomical vs Cement grey in Real Spaces
1 real room side by side. Seeing Astronomical and Cement grey in actual rooms makes the difference concrete; browse the spaces below to get a feel for how each color lives on a wall.
Bedroom
Bedroom walls are often seen under warm artificial light, a context that shifts both colors from how they look on a chip. The LRV gap is large enough that Cement grey will make the room feel meaningfully brighter than Astronomical would.
Color Details
Astronomical vs Cement grey Simulated Comparison
5 simulated room previews — drag the slider on each to see Astronomical on one side and Cement 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.
