Color

#bb1f11

#bb1f11
hex#bb1f11
rgbrgb(187, 31, 17)
hslhsl(5, 83%, 40%)
oklchoklch(0.51 0.192 30)
Closest name: Bloodshed (#ba271a)Relative luminance 0.1159

Colors that go with #bb1f11

Royal Blue, Sea Green and Steel 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 →

#11adbb

#bb1158 · #bb7411

#11bb1f · #1f11bb

Split-complementary

Open in tool →

#11bb74 · #1158bb

#58bb11 · #11adbb · #7411bb

Contrast

#bb1f11 as textRatioAAAA largeAAAFix
Aaon white
6.33:1passpassfail
  • AAA: use #ad1d10 as the text (7.09:1)
Aaon black
3.32:1failpassfail
  • AA: use #e52715 as the text (4.63:1)
  • AAA: use #f06c60 as the text (7.02:1)
  • AA: or shift the background to #dbdbdb (4.57:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #bb1f11 as the background.

Brands using this color

Palettes built around it

Fonts for this mood

#bb1f11 reads as warm, vivid, playful. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #bb1f11
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 #bb1f11 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/bb1f11-c4a49c-62cba1-2d261f-f1e9ec?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