Mt. Rainier vs RAL 850-4
Mt. Rainier is a PPG color while RAL 850-4 comes from RAL Effect. These are both greys, so the question isn't which hue to choose — it's where within grey to land. With LRVs of 28 and 27, they'll behave almost identically in terms of how much light they reflect back into a room. With a ΔE of 1.6, the difference is subtle — you'd need them side by side to reliably tell them apart. Below you'll find 4 real-room photo comparisons where both colors appear side by side, plus 5 simulated room previews.
Mt. Rainier vs RAL 850-4 in Real Spaces
4 real rooms side by side. Mt. Rainier and RAL 850-4 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.
Living Room
Living rooms test a color across a full range of conditions — morning sun, afternoon shade, and evening lamp light all shift how both of these read. In photos like these you're seeing the difference at its most direct. In a finished room, the distinction is there but not dramatic.
Bedroom
Bedroom walls are often seen under warm artificial light, a context that shifts both colors from how they look on a chip. The two are close enough that the choice comes down to finer qualities — undertone, texture, what the color sits next to.
Kitchen
Kitchen lighting tends to be bright and directional, which sharpens contrast and makes undertone differences more apparent. The two are close enough that the choice comes down to finer qualities — undertone, texture, what the color sits next to.
Bathroom
Bathrooms amplify color — the enclosed space and reflective surfaces make what reads subtle elsewhere feel more present here. The two are close enough that the choice comes down to finer qualities — undertone, texture, what the color sits next to.
Color Details
Mt. Rainier vs RAL 850-4 Simulated Comparison
5 simulated room previews — drag the slider on each to see Mt. Rainier on one side and RAL 850-4 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.
At LRV 69 vs 28, Ammonite is decisively the brighter choice.
White Dove reflects far more light (LRV 83 vs 28), opening up a space where Mt. Rainier encloses it.
Mt. Rainier reflects far more light (LRV 28 vs 6), opening up a space where Iron Ore encloses it.
At LRV 52 vs 28, Purbeck Stone is decisively the brighter choice.
Their light reflectance is nearly identical (LRV 30 vs 28), so neither reads brighter in a room.
Mizzle reflects far more light (LRV 52 vs 28), opening up a space where Mt. Rainier encloses it.
At LRV 60 vs 28, Agreeable Gray is decisively the brighter choice.
Accessible Beige reflects far more light (LRV 58 vs 28), opening up a space where Mt. Rainier encloses it.
With LRVs of 28 and 27, the two reflect almost the same amount of light.
At LRV 43 vs 28, French Gray is decisively the brighter choice.
At LRV 28 vs 4, Mt. Rainier is decisively the brighter choice.
Tranquil Dawn reflects far more light (LRV 55 vs 28), opening up a space where Mt. Rainier encloses it.
Mt. Rainier reflects far more light (LRV 28 vs 13), opening up a space where Bancha encloses it.
Hardwick White reflects far more light (LRV 44 vs 28), opening up a space where Mt. Rainier encloses it.
At LRV 84 vs 28, Pure White is decisively the brighter choice.
A 7-point LRV gap (28 vs 21) makes Mt. Rainier the marginally brighter of the two.
Balboa Mist reflects far more light (LRV 66 vs 28), opening up a space where Mt. Rainier encloses it.
Shoji White reflects far more light (LRV 74 vs 28), opening up a space where Mt. Rainier encloses it.
Snowbound reflects far more light (LRV 83 vs 28), opening up a space where Mt. Rainier encloses it.
At LRV 51 vs 28, Pigeon is decisively the brighter choice.
Mt. Rainier reflects far more light (LRV 28 vs 12), opening up a space where Pewter Green encloses it.
Mt. Rainier reflects far more light (LRV 28 vs 8), opening up a space where Duck Green encloses it.
Skimming Stone reflects far more light (LRV 68 vs 28), opening up a space where Mt. Rainier encloses it.
At LRV 41 vs 28, Dix Blue is decisively the brighter choice.
Mt. Rainier reflects far more light (LRV 28 vs 12), opening up a space where Vintage Vogue encloses it.
Saybrook Sage reflects far more light (LRV 45 vs 28), opening up a space where Mt. Rainier encloses it.
A 3-point LRV gap (31 vs 28) makes Pale Green the marginally brighter of the two.