Color

#bb0221

#bb0221
hex#bb0221
rgbrgb(187, 2, 33)
hslhsl(350, 98%, 37%)
oklchoklch(0.5 0.201 24.1)
Closest name: Akai Red (#bc012e)Relative luminance 0.1072

Colors that go with #bb0221

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 →

#02bb9c

#bb027d · #bb4002

#21bb02 · #0221bb

Split-complementary

Open in tool →

#02bb40 · #027dbb

#7dbb02 · #02bb9c · #4002bb

Contrast

#bb0221 as textRatioAAAA largeAAAFix
Aaon white
6.68:1passpassfail
  • AAA: use #b1021f as the text (7.25:1)
Aaon black
3.14:1failpassfail
  • AA: use #ed022a as the text (4.64:1)
  • AAA: use #fd5d78 as the text (7.01:1)
  • AA: or shift the background to #d4d4d4 (4.51:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #bb0221 as the background.

Brands using this color

Palettes built around it

Fonts for this mood

#bb0221 reads as warm, vivid, playful. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #bb0221
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 #bb0221 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/bb0221-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