Coastal Grey vs Ammonite
Coastal Grey (Dulux) and Ammonite (Farrow & Ball) come from different manufacturers. Coastal Grey reads as blue-grey, while Ammonite reads as beige-greige — two distinct hue families, not close cousins. The 13-point LRV gap — 69 for Ammonite vs 56 for Coastal Grey — means Ammonite will open up a space more effectively. Where Coastal Grey leans cool, Ammonite reads warm — a distinction that shifts noticeably depending on the light source and surrounding finishes. A ΔE of 12.5 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.
Coastal Grey vs Ammonite in Real Spaces
2 real rooms side by side. Seeing Coastal Grey 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 Coastal Grey.
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
Coastal Grey vs Ammonite Simulated Comparison
5 simulated room previews — drag the slider on each to see Coastal Grey 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 Coastal Grey comparisons
See how Coastal Grey stacks up against other well-photographed colors across different brands and tones.
