What 13 tells you about Porpoise
The published LRV of Sherwin-Williams Porpoise SW-7047 is 13. It describes light reflectance; it does not specify an undertone or predict the brightness of your room. Porpoise is lighter than Urbane Bronze while remaining a deep gray-bronze option.
The choice beside cream limestone and walnut shelving
Cream limestone can define the built-in as a whole, whereas walnut shelves need a closer check against the painted interior surfaces.
Draw the proposed dark area on a room photograph and compare it with a broad physical Porpoise sample in shadow. The LRV describes the starting depth, while the size and location of that area determine its role. Check whether adjacent dark furniture remains legible.
What the comparison can—and cannot—settle
Porpoise has an LRV of 13; Sherwin-Williams Urbane Bronze SW-7048 is 8. The difference is 5 points, with Porpoise returning more light under the reference measurement. Porpoise is a gray-bronze color with deep reflectance. 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.
Check the outline of the shelving against the dark paint; keep depth where it clarifies the architecture. Do not read LRV 13 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 Porpoise SW-7047. The recorded LRV is 13. 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.