Color

#81091d

#81091d
hex#81091d
rgbrgb(129, 9, 29)
hslhsl(350, 87%, 27%)
oklchoklch(0.386 0.149 21.4)
Closest name: Bloodthirsty (#880011)Relative luminance 0.0495

Tints & shades

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

Harmonies

Complementary

Open in tool →

#09816d

#810959 · #813109

#1d8109 · #091d81

Split-complementary

Open in tool →

#098131 · #095981

#598109 · #09816d · #310981

Contrast

#81091d as textRatioAAAA largeAAAFix
Aaon white
10.55:1passpasspassPasses AAA — no fix needed.
Aaon black
1.99:1failfailfail
  • AA: use #ea1034 as the text (4.62:1)
  • AAA: use #f4667e as the text (7.05:1)
  • AA: or shift the background to #ababab (4.59:1)
  • AAA: or shift the background to #d4d4d4 (7.12:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #81091d as the background.

Brands using this color

No public brand in the corpus uses this exact color yet. Extract a brand to add one.

Fonts for this mood

#81091d reads as warm, vivid, dark. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #81091d
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 #81091d and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/81091d-c49c9e-62cb87-2d231f-f1e9ee?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