Coastal Plain vs Plummy
Both are Sherwin-Williams colors. Coastal Plain reads as green-grey, while Plummy reads as grey — two distinct hue families, not close cousins. At LRV 37 vs 11, Coastal Plain will read as the brighter of the two — a 25-point gap that matters most in north-facing or low-light rooms. The tonal difference — Coastal Plain's neutral character against Plummy's cool — becomes most visible against white trim or in morning light. At ΔE 38.4, these are genuinely distinct colors — a strong contrast if used together, or a meaningful choice between two different directions. Below, 5 simulated room previews show how each color reads at scale — real-room photos will be added as they become available.
Color Details
Coastal Plain vs Plummy Simulated Comparison
5 simulated room previews — drag the slider on each to see Coastal Plain on one side and Plummy 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.