What 37 tells you about Coastal Plain
The published LRV of Sherwin-Williams Coastal Plain SW-6192 is 37. It describes light reflectance; it does not specify an undertone or predict the brightness of your room. Coastal Plain gives cool green more depth than Contented, which can help the wall hold its own behind pale furnishings.
The choice beside cream fabric and weathered wood
Weathered wood and cream fabrics provide a restrained support palette, but a narrow hallway may need a separate depth decision.
Compare Coastal Plain and Contented at equal size, first considering depth and then hue. A lighter blue, green or pink is still a colored surface. Use the LRV to organize the depth question without assuming that it measures saturation or predicts which hue the room will favor.
What the comparison can—and cannot—settle
Coastal Plain has an LRV of 37; Sherwin-Williams Contented SW-6191 is 52. The difference is 15 points, with Contented returning more light under the reference measurement. Coastal Plain is a cool green with a midtone reflectance value. The value measures reflectance, so it cannot by itself identify an undertone, a coating finish or the amount of illumination needed in the room. The daylight and evening-light checks covers that related choice.
Keep the added depth if it anchors the furniture; check a lighter green before using it through a narrow hall. Do not read LRV 37 as a percentage improvement in perceived room brightness. Make the decision with the board upright at the actual wall or cabinet position, including the least illuminated portion. The north-facing room assessment covers that related choice. Before ordering samples, compare room-planning features in the paint color visualizer roundup.
Sources & notes
Color specifications: Sherwin-Williams Coastal Plain SW-6192. The recorded LRV is 37. Named comparison values come from the respective manufacturers; material schemes are editorial suggestions.
This guide reviews published color information and proposes practical sample checks. It does not claim first-hand paint testing or customer-review scores. Sherwin-Williams does not sponsor or endorse this site. Product names and trademarks belong to their respective owners. Confirm the color in a physical sample and select the coating for the actual surface and finish.