Coastal Plain vs Opaline
Both are Sherwin-Williams colors. These are both green-greys, so the question isn't which hue to choose — it's where within green-grey to land. At LRV 73 vs 37, Opaline will read as the brighter of the two — a 36-point gap that matters most in north-facing or low-light rooms. They share a neutral quality — useful to know if you're layering them in the same space. At ΔE 22.1, these are genuinely distinct colors — a strong contrast if used together, or a meaningful choice between two different directions. Below you'll find 3 real-room photo comparisons where both colors appear side by side, plus 5 simulated room previews.
Coastal Plain vs Opaline in Real Spaces
3 real rooms side by side. Seeing Coastal Plain and Opaline 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
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. Opaline returns significantly more light to the room — in a smaller or darker space, that difference in perceived brightness is hard to miss.
Bedroom
Bedroom walls are often seen under warm artificial light, a context that shifts both colors from how they look on a chip. The LRV gap is large enough that Opaline will make the room feel meaningfully brighter than Coastal Plain would.
Bathroom
Bathrooms amplify color — the enclosed space and reflective surfaces make what reads subtle elsewhere feel more present here. The LRV gap is large enough that Opaline will make the room feel meaningfully brighter than Coastal Plain would.
Color Details
Coastal Plain vs Opaline Simulated Comparison
5 simulated room previews — drag the slider on each to see Coastal Plain on one side and Opaline 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.