Coastal Plain vs Rare Gray
Both from Sherwin-Williams's palette. Hue-wise, Coastal Plain belongs to the green-grey family and Rare Gray to the grey family. They have nearly identical light reflectance values (37 vs 38), so they'll read as similarly Medium in most lighting conditions. Both lean neutral, so they'll behave similarly in mixed or changing light conditions. The ΔE 4.8 gap is real but not dramatic — close enough to use together, distinct enough to matter as a choice. Below you'll find 3 real-room photo comparisons where both colors appear side by side, plus 5 simulated room previews.
Coastal Plain vs Rare Gray in Real Spaces
3 real rooms side by side. Coastal Plain and Rare Gray 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.
Kitchen
In a kitchen, colors are seen under bright task lighting that amplifies undertones — what reads neutral elsewhere can show its hand here. The distinction reads clearly at room scale, making the choice between them concrete.
Bathroom
Bathrooms are one of the few spaces where you're genuinely enclosed by the paint color, which makes the choice between these two more consequential. The distinction reads clearly at room scale, making the choice between them concrete.
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. The distinction reads clearly at room scale, making the choice between them concrete.
Color Details
Coastal Plain vs Rare Gray Simulated Comparison
5 simulated room previews — drag the slider on each to see Coastal Plain on one side and Rare Gray 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 Coastal Plain comparisons
See how Coastal Plain stacks up against other well-photographed colors across different brands and tones.
Ammonite reflects far more light (LRV 69 vs 37), opening up a space where Coastal Plain encloses it.
At LRV 83 vs 37, White Dove is decisively the brighter choice.
At LRV 37 vs 6, Coastal Plain is decisively the brighter choice.
Purbeck Stone reflects far more light (LRV 52 vs 37), opening up a space where Coastal Plain encloses it.
Coastal Plain reads slightly lighter (LRV 37 vs 30), a gap that shows most in low-lit rooms.
At LRV 52 vs 37, Mizzle is decisively the brighter choice.
Agreeable Gray reflects far more light (LRV 60 vs 37), opening up a space where Coastal Plain encloses it.
At LRV 58 vs 37, Accessible Beige is decisively the brighter choice.
A 10-point LRV gap (37 vs 27) makes Coastal Plain the marginally brighter of the two.
French Gray reads slightly lighter (LRV 43 vs 37), a gap that shows most in low-lit rooms.
Coastal Plain reflects far more light (LRV 37 vs 4), opening up a space where Naval encloses it.
At LRV 55 vs 37, Tranquil Dawn is decisively the brighter choice.
At LRV 37 vs 13, Coastal Plain is decisively the brighter choice.
A 7-point LRV gap (44 vs 37) makes Hardwick White the marginally brighter of the two.
Pure White reflects far more light (LRV 84 vs 37), opening up a space where Coastal Plain encloses it.
Coastal Plain reflects far more light (LRV 37 vs 21), opening up a space where Artichoke encloses it.
At LRV 66 vs 37, Balboa Mist is decisively the brighter choice.
At LRV 74 vs 37, Shoji White is decisively the brighter choice.
At LRV 83 vs 37, Snowbound is decisively the brighter choice.
Pigeon reflects far more light (LRV 51 vs 37), opening up a space where Coastal Plain encloses it.
At LRV 37 vs 12, Coastal Plain is decisively the brighter choice.
At LRV 37 vs 8, Coastal Plain is decisively the brighter choice.
At LRV 68 vs 37, Skimming Stone is decisively the brighter choice.
Dix Blue reads slightly lighter (LRV 41 vs 37), a gap that shows most in low-lit rooms.
At LRV 37 vs 12, Coastal Plain is decisively the brighter choice.
A 9-point LRV gap (45 vs 37) makes Saybrook Sage the marginally brighter of the two.
Coastal Plain reads slightly lighter (LRV 37 vs 31), a gap that shows most in low-lit rooms.