Color

#bb1b33

#bb1b33
hex#bb1b33
rgbrgb(187, 27, 51)
hslhsl(351, 75%, 42%)
oklchoklch(0.511 0.191 20.8)
Closest name: Active Volcano (#bb1133)Relative luminance 0.1159

Colors that go with #bb1b33

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 →

#1bbba3

#bb1b83 · #bb531b

#33bb1b · #1b33bb

Split-complementary

Open in tool →

#1bbb53 · #1b83bb

#83bb1b · #1bbba3 · #531bbb

Contrast

#bb1b33 as textRatioAAAA largeAAAFix
Aaon white
6.33:1passpassfail
  • AAA: use #ae192f as the text (7.05:1)
Aaon black
3.32:1failpassfail
  • AA: use #e02944 as the text (4.57:1)
  • AAA: use #eb7083 as the text (7.18:1)
  • 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 #bb1b33 as the background.

Brands using this color

Fonts for this mood

#bb1b33 reads as warm, vivid, playful. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #bb1b33
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 #bb1b33 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/bb1b33-c49c9e-62cb89-2d231f-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