Color

#18211c

#18211c
hex#18211c
rgbrgb(24, 33, 28)
hslhsl(147, 16%, 11%)
oklchoklch(0.237 0.016 160.6)
Closest name: Underworld (#1e231c)Relative luminance 0.0137

Tints & shades

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

Harmonies

Complementary

Open in tool →

#21181c

#182118 · #182120

#1c1821 · #211c18

Split-complementary

Open in tool →

#201821 · #211818

#181821 · #21181c · #212018

Contrast

#18211c as textRatioAAAA largeAAAFix
Aaon white
16.49:1passpasspassPasses AAA — no fix needed.
Aaon black
1.27:1failfailfail
  • AA: use #5a7c69 as the text (4.52:1)
  • AAA: use #7a9f8a as the text (7.15:1)
  • AA: or shift the background to #878787 (4.59:1)
  • AAA: or shift the background to #ababab (7.18:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #18211c as the background.

Brands using this color

Palettes built around it

Fonts for this mood

#18211c reads as muted, dark, luxury. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #18211c
live endpoint

Point any MCP client at the shared colors endpoint and your agent gets the same engine as this page — generate_palette, check_contrast, analyze_color — read-only, no key. Every palette it proposes comes with a /palettes/new/… link: open it, lock what you like, paste the link back.

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

analyze #18211c and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/18211c-a2beb2-d059d4-1f2d2c-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