Color

#831111

#831111
hex#831111
rgbrgb(131, 17, 17)
hslhsl(0, 77%, 29%)
oklchoklch(0.393 0.148 27.5)
Closest name: Bloodthirsty (#880011)Relative luminance 0.0527

Tints & shades

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

Harmonies

Complementary

Open in tool →

#118383

#83114a · #834a11

#118311 · #111183

Split-complementary

Open in tool →

#11834a · #114a83

#4a8311 · #118383 · #4a1183

Contrast

#831111 as textRatioAAAA largeAAAFix
Aaon white
10.23:1passpasspassPasses AAA — no fix needed.
Aaon black
2.05:1failfailfail
  • AA: use #e32626 as the text (4.57:1)
  • AAA: use #ec6f6f as the text (7.07:1)
  • AA: or shift the background to #adadad (4.56:1)
  • AAA: or shift the background to #d6d6d6 (7.04:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #831111 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

#831111 reads as warm, vivid, dark. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #831111
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 #831111 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/831111-c4a19c-62cb98-2d251f-f1e9ed?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