Color

#bb1b40

#bb1b40
hex#bb1b40
rgbrgb(187, 27, 64)
hslhsl(346, 75%, 42%)
oklchoklch(0.514 0.191 15.9)
Closest name: Active Volcano (#bb1133)Relative luminance 0.1172

Colors that go with #bb1b40

Royal Blue, Steel Blue and Teal 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 →

#1bbb96

#bb1b91 · #bb461b

#40bb1b · #1b40bb

Split-complementary

Open in tool →

#1bbb46 · #1b91bb

#91bb1b · #1bbb96 · #461bbb

Contrast

#bb1b40 as textRatioAAAA largeAAAFix
Aaon white
6.28:1passpassfail
  • AAA: use #aa183a as the text (7.24:1)
Aaon black
3.34:1failpassfail
  • AA: use #e02450 as the text (4.54:1)
  • AAA: use #ea6c89 as the text (7:1)
  • AA: or shift the background to #dbdbdb (4.54:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #bb1b40 as the background.

Brands using this color

Fonts for this mood

#bb1b40 reads as warm, vivid, playful. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #bb1b40
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 #bb1b40 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/bb1b40-c49ca1-62cb80-2d221f-f1e9ef?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