Color

#bc0b37

#bc0b37
hex#bc0b37
rgbrgb(188, 11, 55)
hslhsl(345, 89%, 39%)
oklchoklch(0.507 0.199 18)
Closest name: Active Volcano (#bb1133)Relative luminance 0.1121

Colors that go with #bc0b37

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 →

#0bbc90

#bc0b90 · #bc370b

#37bc0b · #0b37bc

Split-complementary

Open in tool →

#0bbc37 · #0b90bc

#90bc0b · #0bbc90 · #370bbc

Contrast

#bc0b37 as textRatioAAAA largeAAAFix
Aaon white
6.48:1passpassfail
  • AAA: use #b20a34 as the text (7.03:1)
Aaon black
3.24:1failpassfail
  • AA: use #e70d44 as the text (4.54:1)
  • AAA: use #f66589 as the text (7.14:1)
  • AA: or shift the background to #d9d9d9 (4.59:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #bc0b37 as the background.

Brands using this color

Fonts for this mood

#bc0b37 reads as warm, vivid, playful. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #bc0b37
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 #bc0b37 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/bc0b37-c49ca1-62cb7e-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