What 83 tells you about Cotton
The published LRV of Sherwin-Williams Cotton SW-9581 is 83. It describes light reflectance; it does not specify an undertone or predict the brightness of your room. Cotton's high LRV supplies a clear lightness reference, but the available description does not support a precise undertone claim.
The choice beside limestone and white upholstery
Limestone and white upholstery create a close palette in which the actual material boundary should decide the preferred white.
Read the narrow edge between Cotton and the existing white from several steps away. Repeat with Greek Villa in that same position. The question is whether the wall needs a barely visible transition or an obvious boundary; a high LRV can support either result depending on its neighbor.
What the comparison can—and cannot—settle
Cotton has an LRV of 83; Sherwin-Williams Greek Villa SW-7551 is 84. The difference is 1 points, with Greek Villa returning more light under the reference measurement. Cotton SW-9581 is a high-reflectance white; its numerical reference is more useful than guessing an undertone from the name. 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.
Use the actual stone to assess the white; the published data do not justify a universal undertone promise. Do not read LRV 83 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 Cotton SW-9581. The recorded LRV is 83. 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.