Iron Grey vs Smooth Stone
Where Iron Grey belongs to Jotun's range, Smooth Stone is a Sherwin-Williams color. Iron Grey reads as grey, while Smooth Stone reads as greige-grey — two distinct hue families, not close cousins. They have nearly identical light reflectance values (39 vs 37), so they'll read as similarly Medium in most lighting conditions. Iron Grey runs neutral while Smooth Stone is decidedly warm, which means they'll respond very differently to warm vs cool light sources. At ΔE 2.3, these are close — the kind of difference that matters when choosing between them, but doesn't read strongly in a finished room. Below, 5 simulated room previews show how each color reads at scale — real-room photos will be added as they become available.
Color Details
Iron Grey vs Smooth Stone Simulated Comparison
5 simulated room previews — drag the slider on each to see Iron Grey on one side and Smooth Stone 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 Iron Grey comparisons
See how Iron Grey stacks up against other well-photographed colors across different brands and tones.
