What 82 tells you about Marshmallow
The published LRV of Sherwin-Williams Marshmallow SW-7001 is 82. It describes light reflectance; it does not specify an undertone or predict the brightness of your room. Marshmallow's pink undertone gives the white a specific relationship to investigate beside pink-beige stone.
The choice beside pink-beige marble and oak
Marble veining can be flattering while the slab background disagrees, so the entire stone sample should remain visible.
Read the narrow edge between Marshmallow and the existing white from several steps away. Repeat with Ivory Lace 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
Marshmallow has an LRV of 82; Sherwin-Williams Ivory Lace SW-7013 is 79. The difference is 3 points, with Marshmallow returning more light under the reference measurement. Marshmallow is a white with a pink undertone. 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 marble's plain background as well as its veining in the test; pink should connect rather than dominate. Do not read LRV 82 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 Marshmallow SW-7001. The recorded LRV is 82. 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.