Mountain Gray vs Iron Ore
Mountain Gray (PPG) and Iron Ore (Sherwin-Williams) come from different manufacturers. Hue-wise, Mountain Gray belongs to the beige-greige family and Iron Ore to the grey family. The 70-point LRV gap — 76 for Mountain Gray vs 6 for Iron Ore — means Mountain Gray will open up a space more effectively. A ΔE of 62.2 puts these firmly in different territory — two distinct design choices rather than close alternatives. Below you'll find 10 real-room photo comparisons where both colors appear side by side, plus 5 simulated room previews.
Mountain Gray vs Iron Ore in Real Spaces
10 real rooms side by side. Seeing Mountain 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
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. Mountain Gray reflects noticeably more light off the walls, making the space read more open than Iron Ore.
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. Mountain Gray returns significantly more light to the room — in a smaller or darker space, that difference in perceived brightness is hard to miss.
Kitchen
Kitchens often have the harshest, most revealing light in the house — under-cabinet LEDs and overhead fixtures that strip away subtlety. Mountain Gray 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 Mountain Gray will make the room feel meaningfully brighter than Iron Ore 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. Mountain Gray returns significantly more light to the room — in a smaller or darker space, that difference in perceived brightness is hard to miss.
Home Office
Home office walls matter more than most — you're looking at them all day, and a color that reads fine at first can become tiring over time. Mountain Gray returns significantly more light to the room — in a smaller or darker space, that difference in perceived brightness is hard to miss.
Mudroom
In a hardworking space like a mudroom, the depth and warmth of a color reads differently than in a quieter room. The LRV gap is large enough that Mountain Gray will make the room feel meaningfully brighter than Iron Ore would.
Patio
Exterior colors look different in open light — both tend to read lighter outside than on an interior swatch, and shadows read more strongly. The LRV gap is large enough that Mountain Gray will make the room feel meaningfully brighter than Iron Ore would.
House
A full exterior is the most demanding test for a paint color — scale and outdoor light both amplify differences that seem small on a swatch. Mountain Gray returns significantly more light to the room — in a smaller or darker space, that difference in perceived brightness is hard to miss.
Front Door
On a front door, the color is both the first and last thing you see — a context where even a modest tonal difference reads clearly. Mountain Gray reflects noticeably more light off the walls, making the space read more open than Iron Ore.
Color Details
Mountain Gray vs Iron Ore Simulated Comparison
5 simulated room previews — drag the slider on each to see Mountain 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 Mountain Gray comparisons
See how Mountain Gray stacks up against other well-photographed colors across different brands and tones.
Mountain Gray reads slightly lighter (LRV 76 vs 69), a gap that shows most in low-lit rooms.
A 7-point LRV gap (83 vs 76) makes White Dove the marginally brighter of the two.
Mountain Gray reflects far more light (LRV 76 vs 52), opening up a space where Purbeck Stone encloses it.
Mountain Gray reflects far more light (LRV 76 vs 30), opening up a space where Evergreen Fog encloses it.
At LRV 76 vs 52, Mountain Gray is decisively the brighter choice.
Mountain Gray reflects far more light (LRV 76 vs 60), opening up a space where Agreeable Gray encloses it.
At LRV 76 vs 58, Mountain Gray is decisively the brighter choice.
At LRV 76 vs 27, Mountain Gray is decisively the brighter choice.
Mountain Gray reflects far more light (LRV 76 vs 43), opening up a space where French Gray encloses it.
Mountain Gray reflects far more light (LRV 76 vs 4), opening up a space where Naval encloses it.
At LRV 76 vs 55, Mountain Gray is decisively the brighter choice.
At LRV 76 vs 13, Mountain Gray is decisively the brighter choice.
At LRV 76 vs 44, Mountain Gray is decisively the brighter choice.
Pure White reads slightly lighter (LRV 84 vs 76), a gap that shows most in low-lit rooms.
Mountain Gray reflects far more light (LRV 76 vs 21), opening up a space where Artichoke encloses it.
A 10-point LRV gap (76 vs 66) makes Mountain Gray the marginally brighter of the two.
Their light reflectance is nearly identical (LRV 76 vs 74), so neither reads brighter in a room.
A 7-point LRV gap (83 vs 76) makes Snowbound the marginally brighter of the two.
Mountain Gray reflects far more light (LRV 76 vs 51), opening up a space where Pigeon encloses it.
At LRV 76 vs 12, Mountain Gray is decisively the brighter choice.
At LRV 76 vs 8, Mountain Gray is decisively the brighter choice.
A 8-point LRV gap (76 vs 68) makes Mountain Gray the marginally brighter of the two.
Mountain Gray reflects far more light (LRV 76 vs 41), opening up a space where Dix Blue encloses it.
At LRV 76 vs 12, Mountain Gray is decisively the brighter choice.
At LRV 76 vs 45, Mountain Gray is decisively the brighter choice.
Mountain Gray reflects far more light (LRV 76 vs 31), opening up a space where Pale Green encloses it.
Mountain Gray reflects far more light (LRV 76 vs 7), opening up a space where Pine Needle encloses it.