Millstone Gray vs Iron Ore
Where Millstone Gray belongs to Benjamin Moore's range, Iron Ore is a Sherwin-Williams color. Both sit in the grey family, which is useful context if you're narrowing within a single hue direction. Millstone Gray (LRV 17) reflects noticeably more light than Iron Ore (LRV 6), a difference of 11 points that becomes especially apparent in rooms with limited natural light. Millstone Gray runs green while Iron Ore is decidedly neutral, which means they'll respond very differently to warm vs cool light sources. With a ΔE of 18.9, the contrast is hard to miss. These aren't variations on a theme — they're two different answers to the same question. Below you'll find 4 real-room photo comparisons where both colors appear side by side, plus 5 simulated room previews.
Millstone Gray vs Iron Ore in Real Spaces
4 real rooms side by side. Seeing Millstone Gray and Iron Ore 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
In a living room, color works across both daylight and evening light — the same wall can read very differently at noon and at 8pm. The LRV gap is large enough that Millstone Gray will make the room feel meaningfully brighter than Iron Ore would.
Bedroom
The context that matters most in a bedroom is how a color reads under a bedside lamp at night, not under noon daylight. Millstone Gray reflects noticeably more light off the walls, making the space read more open than Iron Ore.
House
Seen across an entire facade, subtle tonal differences become pronounced. What reads as nearly the same on a chip often reads as clearly different at scale. Millstone Gray reflects noticeably more light off the walls, making the space read more open than Iron Ore.
Kitchen Cabinets
Kitchen cabinets are constantly compared against adjacent materials, which means subtle differences between these two become much more visible. Millstone Gray reflects noticeably more light off the walls, making the space read more open than Iron Ore.
Color Details
Millstone Gray vs Iron Ore Simulated Comparison
5 simulated room previews — drag the slider on each to see Millstone Gray on one side and Iron Ore 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 Millstone Gray comparisons
See how Millstone Gray stacks up against other well-photographed colors across different brands and tones.
