Onyx (BM 2133-10) vs Tricorn Black (SW 6258)
Illustrative room. Screen colors vary; test a sample before you paint.
Quick decision
- Lighter
- Onyx, LRV 5 vs 3.
- Warmer
- About the same, both neutral gray (Lab b* 0.2 vs -0.6).
- North rooms
- Onyx keeps more brightness (L* 17.8 vs 15.3 in north light); both drift gray about equally.
- Trim that works
- Mirage White BM 2116-70, #EBE9EA, LRV 80.7: the Benjamin Moore white closest in hue to both.
- Closeness
- deltaE 1.8, very close. At 1.8, test both side by side if the room is dim or north-facing.
See each color
More comparisons with Tricorn Black
Onyx (BM 2133-10) is slightly lighter than Tricorn Black (SW 6258) and about as warm: LRV 5 vs 3, deltaE 1.8 (very close).
Side by side
| Measure | Onyx | Tricorn Black | Gap |
|---|---|---|---|
| Brand | Benjamin Moore | Sherwin-Williams | |
| Color code | 2133-10 | SW 6258 | |
| Hex | #353434 | #2F2F30 | |
| RGB | 53, 52, 52 | 47, 47, 48 | |
| HSL | 0°, 1%, 21% | 240°, 1%, 19% | |
| LRV (light reflectance value) | 5 | 3 | +2 |
| Lab L* | 21.8 | 19.4 | +2.4 |
| Lab a* | 0.4 | 0.2 | +0.2 |
| Lab b* | 0.2 | -0.6 | +0.8 |
| Undertone | Neutral | Neutral | |
| Temperature | neutral | neutral | |
| Color family | Black | Black |
Same paint, two kinds of light
Onyx (BM 2133-10), published as #353434
#272C32
#433C34
Tricorn Black (SW 6258), published as #2F2F30
#21272E
#3D3730
These swatches and the rooms above are a simulation, not a measurement. How the visualizer works
Which should you pick
Rules of thumb computed from the LRV and Lab values in the table above; no room test was done.
- Pick Onyx (BM 2133-10) for a small room or a north-facing room, because it is 2 LRV points lighter (5 vs 3), so it bounces back more of the limited light
Closest matches to Onyx in other brands
Closest matches to Tricorn Black in other brands
Common questions
- Is Onyx the same color as Tricorn Black?
- They are very close: a CIEDE2000 difference of 1.8. Side by side you may see a slight difference between Onyx and Tricorn Black.
- Which is lighter, Onyx or Tricorn Black?
- Onyx, with an LRV of 5 against 3.
Full pages
Related comparisons
Sources: Onyx: LRV and hex from Benjamin Moore technical data (verified 2026-10-02); Tricorn Black: LRV and hex as published by the manufacturer, via PaintDB (CC BY 4.0). Color differences are CIEDE2000 values computed by this site from the hex values (data snapshot 2026-10-01). Color names and codes belong to their manufacturers.