Color

#23231b

#23231b
hex#23231b
rgbrgb(35, 35, 27)
hslhsl(60, 13%, 12%)
oklchoklch(0.253 0.014 107.4)
Closest name: Underworld (#1e231c)Relative luminance 0.0164

Colors that go with #23231b

Charcoal, Amber and Blue lead the list. Each partner is a real named colour with the reason it works — a wheel relationship, a neutral that carries it, or a pairing lifted from a palette or brand system that actually shipped — and every pair opens in the palette tool.

Tints & shades

Every swatch is its own page — click any to analyze it.

Harmonies

Complementary

Open in tool →

#1b1b23

#231f1b · #1f231b

#1b2323 · #231b23

Split-complementary

Open in tool →

#1b1f23 · #1f1b23

#1b231f · #1b1b23 · #231b1f

Contrast

#23231b as textRatioAAAA largeAAAFix
Aaon white
15.82:1passpasspassPasses AAA — no fix needed.
Aaon black
1.33:1failfailfail
  • AA: use #76765b as the text (4.51:1)
  • AAA: use #979778 as the text (7.01:1)
  • AA: or shift the background to #8a8a8a (4.58:1)
  • AAA: or shift the background to #adadad (7.05:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #23231b as the background.

Brands using this color

Palettes built around it

Fonts for this mood

#23231b reads as muted, dark, luxury. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #23231b
live endpoint

Point any MCP client at the shared colors endpoint and your agent gets the same engine as this page — direct_palette, edit_direction, check_palette, check_contrast — read-only, no key. Every direction it proposes comes with a /colors/d/… link: open it, lock what you like, paste the link back, and the agent edits rather than re-rolls.

endpointhttps://mcp.brandsweets.com/colors/mcp
claude mcp add --transport http brandsweets-colors https://mcp.brandsweets.com/colors/mcp
try this prompt

analyze #23231b and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/23231b-bbbea2-4e94df-272d1f-f1ede9?lock=0&style=vibrant

Want the agent to remember your picks and write them into a living brand? Create a free BrandSweets workspace.

Machine-readable: color.md