Undersea vs Just Walnut
Undersea (Behr) and Just Walnut (Dulux) come from different manufacturers. Undersea reads as blue-grey, while Just Walnut reads as beige-greige — two distinct hue families, not close cousins. The 63-point LRV gap — 72 for Just Walnut vs 9 for Undersea — means Just Walnut will open up a space more effectively. Where Undersea leans blue, Just Walnut reads warm — a distinction that shifts noticeably depending on the light source and surrounding finishes. A ΔE of 51.9 puts these firmly in different territory — two distinct design choices rather than close alternatives. Below you'll find 2 real-room photo comparisons where both colors appear side by side, plus 5 simulated room previews.
Undersea vs Just Walnut in Real Spaces
2 real rooms side by side. Seeing Undersea 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 Undersea.
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. Just Walnut returns significantly more light to the room — in a smaller or darker space, that difference in perceived brightness is hard to miss.
Color Details
Undersea vs Just Walnut Simulated Comparison
5 simulated room previews — drag the slider on each to see Undersea 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 Undersea comparisons
See how Undersea stacks up against other well-photographed colors across different brands and tones.
