Undersea vs Obsidian Green
Undersea (Behr) and Obsidian Green (Little Greene) come from different manufacturers. Undersea reads as blue-grey, while Obsidian Green reads as green — two distinct hue families, not close cousins. The 8-point LRV gap — 9 for Undersea vs 1 for Obsidian Green — means Undersea will open up a space more effectively. Where Undersea leans blue, Obsidian Green reads green — a distinction that shifts noticeably depending on the light source and surrounding finishes. A ΔE of 27.4 puts these firmly in different territory — two distinct design choices rather than close alternatives. Below you'll find 3 real-room photo comparisons where both colors appear side by side, plus 5 simulated room previews.
Undersea vs Obsidian Green in Real Spaces
3 real rooms side by side. Seeing Undersea and Obsidian Green 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. Undersea reflects noticeably more light off the walls, making the space read more open than Obsidian Green.
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. Undersea returns significantly more light to the room — in a smaller or darker space, that difference in perceived brightness is hard to miss.
Front Door
On a front door, the color is both the first and last thing you see — a context where even a modest tonal difference reads clearly. Undersea reflects noticeably more light off the walls, making the space read more open than Obsidian Green.
Color Details
Undersea vs Obsidian Green Simulated Comparison
5 simulated room previews — drag the slider on each to see Undersea on one side and Obsidian Green 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.
