What 3 tells you about Black Magic
The published LRV of Sherwin-Williams Black Magic SW-6991 is 3. It describes light reflectance; it does not specify an undertone or predict the brightness of your room. Black Magic and Tricorn Black share the same LRV, so a claimed brightness advantage would be unsupported.
The choice beside warm white plaster and brass
Warm plaster and brass provide a reason to compare Black Magic's slight warmth, using authentic samples rather than the numerical tie alone.
Draw the proposed dark area on a room photograph and compare it with a broad physical Black Magic 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
Black Magic and Tricorn Black both have a published LRV of 3. That equality describes reflectance, not matching colorants or identical undertones. Black Magic is a very dark black with a slight warm influence. 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.
Test it directly against Tricorn Black; equal LRV does not mean an identical color impression. Do not read LRV 3 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 Black Magic SW-6991. The recorded LRV is 3. 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.