Warm Onyx vs Just Walnut
Warm Onyx (Behr) and Just Walnut (Dulux) come from different manufacturers. Hue-wise, Warm Onyx belongs to the grey family and Just Walnut to the beige-greige family. The 65-point LRV gap — 72 for Just Walnut vs 7 for Warm Onyx — means Just Walnut will open up a space more effectively. Where Warm Onyx leans red, Just Walnut reads warm — a distinction that shifts noticeably depending on the light source and surrounding finishes. A ΔE of 56.5 puts these firmly in different territory — two distinct design choices rather than close alternatives. Below you'll find 1 real-room photo comparison where both colors appear side by side, plus 5 simulated room previews.
Warm Onyx vs Just Walnut in Real Spaces
1 real room side by side. Seeing Warm Onyx 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.
Living Room
A living room wall sees more varied light than almost any other surface in the house, which makes the choice between these two more nuanced than a chip suggests. Just Walnut reflects noticeably more light off the walls, making the space read more open than Warm Onyx.
Color Details
Warm Onyx vs Just Walnut Simulated Comparison
5 simulated room previews — drag the slider on each to see Warm Onyx 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 Warm Onyx comparisons
See how Warm Onyx stacks up against other well-photographed colors across different brands and tones.
