Mt. Rainier vs Stone grey
Mt. Rainier (PPG) and Stone grey (RAL Classic) come from different manufacturers. Both sit in the grey family, which is useful context if you're narrowing within a single hue direction. Their light reflectance values are nearly the same — 28 vs 29 — so neither will read significantly brighter or darker than the other. A ΔE of 1.7 puts them in subtle territory — distinguishable in direct comparison, less so from across a room. Below you'll find 2 real-room photo comparisons where both colors appear side by side, plus 5 simulated room previews.
Mt. Rainier vs Stone grey in Real Spaces
2 real rooms side by side. Mt. Rainier and Stone grey are close enough that the difference can be hard to judge from a chip alone — these photos show how each reads at scale, across different spaces and lighting conditions.
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. In photos like these you're seeing the difference at its most direct. In a finished room, the distinction is there but not dramatic.
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. At this scale the difference is subtle — you'd need them side by side, as shown here, to reliably tell them apart.
Color Details
Mt. Rainier vs Stone grey Simulated Comparison
5 simulated room previews — drag the slider on each to see Mt. Rainier on one side and Stone grey 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 Mt. Rainier comparisons
See how Mt. Rainier stacks up against other well-photographed colors across different brands and tones.
