Ammonite vs Iron Blue
Where Ammonite belongs to Farrow & Ball's range, Iron Blue is a Jotun color. Ammonite reads as beige-greige, while Iron Blue reads as blue-grey — two distinct hue families, not close cousins. Ammonite (LRV 69) reflects noticeably more light than Iron Blue (LRV 18), a difference of 51 points that becomes especially apparent in rooms with limited natural light. Ammonite runs warm while Iron Blue is decidedly neutral, which means they'll respond very differently to warm vs cool light sources. With a ΔE of 38.1, the contrast is hard to miss. These aren't variations on a theme — they're two different answers to the same question. Below, 5 simulated room previews show how each color reads at scale — real-room photos will be added as they become available.
Color Details
Ammonite vs Iron Blue Simulated Comparison
5 simulated room previews — drag the slider on each to see Ammonite on one side and Iron Blue 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 Ammonite comparisons
See how Ammonite stacks up against other well-photographed colors across different brands and tones.
