Color

#1b231e

#1b231e
hex#1b231e
rgbrgb(27, 35, 30)
hslhsl(143, 13%, 12%)
oklchoklch(0.246 0.015 157.7)
Closest name: Underworld (#1e231c)Relative luminance 0.0153

Colors that go with #1b231e

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 →

#231b20

#1c231b · #1b2322

#1e1b23 · #231e1b

Split-complementary

Open in tool →

#221b23 · #231b1c

#1b1c23 · #231b20 · #23221b

Contrast

#1b231e as textRatioAAAA largeAAAFix
Aaon white
16.08:1passpasspassPasses AAA — no fix needed.
Aaon black
1.31:1failfailfail
  • AA: use #5f7c6a as the text (4.58:1)
  • AAA: use #809d8b as the text (7.11:1)
  • AA: or shift the background to #8a8a8a (4.66:1)
  • AAA: or shift the background to #ababab (7:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #1b231e as the background.

Brands using this color

Palettes built around it

Fonts for this mood

#1b231e reads as muted, dark, luxury. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #1b231e
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 #1b231e and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/1b231e-a2beb0-c859d4-1f2d2b-eaf1e9?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