Deep Fossil vs Ammonite
Deep Fossil (Dulux) and Ammonite (Farrow & Ball) come from different manufacturers. Hue-wise, Deep Fossil belongs to the grey family and Ammonite to the beige-greige family. The 38-point LRV gap — 69 for Ammonite vs 31 for Deep Fossil — means Ammonite will open up a space more effectively. Where Deep Fossil leans neutral, Ammonite reads warm — a distinction that shifts noticeably depending on the light source and surrounding finishes. A ΔE of 27.2 puts these firmly in different territory — two distinct design choices rather than close alternatives. Below you'll find 4 real-room photo comparisons where both colors appear side by side, plus 5 simulated room previews.
Deep Fossil vs Ammonite in Real Spaces
4 real rooms side by side. Seeing Deep Fossil and Ammonite 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. Ammonite reflects noticeably more light off the walls, making the space read more open than Deep Fossil.
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. Ammonite returns significantly more light to the room — in a smaller or darker space, that difference in perceived brightness is hard to miss.
Dining Room
Dining rooms often rely on warm incandescent or candlelight, which flatters warm undertones and mutes cool ones. The LRV gap is large enough that Ammonite will make the room feel meaningfully brighter than Deep Fossil would.
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. Ammonite returns significantly more light to the room — in a smaller or darker space, that difference in perceived brightness is hard to miss.
Color Details
Deep Fossil vs Ammonite Simulated Comparison
5 simulated room previews — drag the slider on each to see Deep Fossil on one side and Ammonite 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 Deep Fossil comparisons
See how Deep Fossil stacks up against other well-photographed colors across different brands and tones.
