Astronomical vs Just Walnut
Where Astronomical belongs to Behr's range, Just Walnut is a Dulux color. Hue-wise, Astronomical belongs to the grey family and Just Walnut to the beige-greige family. Just Walnut (LRV 72) reflects noticeably more light than Astronomical (LRV 7), a difference of 65 points that becomes especially apparent in rooms with limited natural light. Astronomical runs green while Just Walnut is decidedly warm, which means they'll respond very differently to warm vs cool light sources. With a ΔE of 56.1, the contrast is hard to miss. These aren't variations on a theme — they're two different answers to the same question. Below you'll find 2 real-room photo comparisons where both colors appear side by side, plus 5 simulated room previews.
Astronomical vs Just Walnut in Real Spaces
2 real rooms side by side. Seeing Astronomical and Just Walnut in actual rooms makes the difference concrete; browse the spaces below to get a feel for how each color lives on a wall.
Bedroom
The context that matters most in a bedroom is how a color reads under a bedside lamp at night, not under noon daylight. Just Walnut reflects noticeably more light off the walls, making the space read more open than Astronomical.
Kitchen
In a kitchen, colors are seen under bright task lighting that amplifies undertones — what reads neutral elsewhere can show its hand here. Just Walnut reflects noticeably more light off the walls, making the space read more open than Astronomical.
Color Details
Astronomical vs Just Walnut Simulated Comparison
5 simulated room previews — drag the slider on each to see Astronomical on one side and Just Walnut 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.
