Onyx
Benjamin Moore
2133-10
Onyx is a near-true black with minimal undertone, neither noticeably warm nor blue. It is a clean choice for interior doors, window frames, islands, and accent walls when the goal is straightforward black without surprises. Designers reach for it when softer blacks like Wrought Iron read too gray for the contrast they need.
Some brands don't share official hex codes. The digital values shown here are careful approximations. Always confirm with a physical sample.
Close matches
Sherwin-Williams: Black Magic SW 6991 (#323132) · Caviar SW 6990 (#313031) · Tricorn Black SW 6258 (#2F2F30)
Farrow & Ball: Smelt Black No. G18 (#3C3C3C) · Pitch Black No. 256 (#3D3C3C) · Black Blue No. 95 (#3E4245)
Similar Benjamin Moore colors: Universal Black 2118-10 (#353435) · Twilight Zone 2127-10 (#343435) · Jet Black 2120-10 (#333334)
Common questions
What is the hex code for Onyx?
The hex code for Benjamin Moore Onyx 2133-10 is #353434. In RGB that is 53, 52, 52. Use these values to reproduce Onyx in SketchUp, Canva, Photoshop, Figma, or rendering software for client presentations and mood boards.
What is the Sherwin-Williams equivalent of Onyx?
The closest Sherwin-Williams match for Onyx is Black Magic SW 6991 (#323132). No cross-brand match is exact, because each brand mixes its own pigment formulas. Always confirm with a physical sample before specifying a substitute.
Is Onyx warm or cool?
Onyx is essentially neutral, one of the most undertone-free blacks in the deck. At an LRV of approximately 4, it absorbs nearly all light, so finish choice matters more than orientation; matte hides texture, satin shows it. Because it carries no strong blue or brown cast, it pairs equally well with warm and cool palettes, which makes it a dependable default black for trim-and-door packages.
Why does Onyx look different on screen than on the wall?
Screens emit light while paint reflects it, so a hex code cannot capture how lighting, sheen, and surrounding colors shift paint in a real room. Treat #353434 as accurate for digital design work, and use physical samples for final approval.
What LRV does Onyx have?
Onyx has a Light Reflectance Value of approximately 4, meaning it reflects about 4% of visible light. That low value makes it a dramatic, light-absorbing choice that works well with strong natural light or as an accent.
Stop tab-hopping between brand sites.
Search 5,500+ colors from all three major brands in one place. Copy the exact values you need for SketchUp, Canva, or client mood boards, and find cross-brand matches in seconds.
