Onyx vs Slaked Lime - Dark
Onyx (Benjamin Moore) and Slaked Lime - Dark (Little Greene) come from different manufacturers. Hue-wise, Onyx belongs to the grey family and Slaked Lime - Dark to the beige-greige family. The 40-point LRV gap — 45 for Slaked Lime - Dark vs 5 for Onyx — means Slaked Lime - Dark will open up a space more effectively. Both share a red character, which means they'll respond to light and surrounding materials in similar ways. A ΔE of 52.9 puts these firmly in different territory — two distinct design choices rather than close alternatives. Below you'll find 5 real-room photo comparisons where both colors appear side by side, plus 5 simulated room previews.
Onyx vs Slaked Lime - Dark in Real Spaces
5 real rooms side by side. Seeing Onyx and Slaked Lime - Dark 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. Slaked Lime - Dark reflects noticeably more light off the walls, making the space read more open than Onyx.
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. Slaked Lime - Dark returns significantly more light to the room — in a smaller or darker space, that difference in perceived brightness is hard to miss.
Bathroom
Small bathrooms intensify color. A shade that seems quiet in a larger room can feel immersive when you're surrounded by it on four walls. Slaked Lime - Dark 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. Slaked Lime - Dark reflects noticeably more light off the walls, making the space read more open than Onyx.
Kitchen Cabinets
Cabinet color is always seen in context — against countertops, backsplash, and hardware — which amplifies undertone differences that might disappear on a plain wall. Slaked Lime - Dark returns significantly more light to the room — in a smaller or darker space, that difference in perceived brightness is hard to miss.
Color Details
Onyx vs Slaked Lime - Dark Simulated Comparison
5 simulated room previews — drag the slider on each to see Onyx on one side and Slaked Lime - Dark 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 Onyx comparisons
See how Onyx stacks up against other well-photographed colors across different brands and tones.
