Color

#bb0737

#bb0737
hex#bb0737
rgbrgb(187, 7, 55)
hslhsl(344, 93%, 38%)
oklchoklch(0.504 0.199 17.7)
Closest name: Active Volcano (#bb1133)Relative luminance 0.1099

Tints & shades

Every swatch is its own page — click any to analyze it.

Harmonies

Complementary

Open in tool →

#07bb8b

#bb0791 · #bb3107

#37bb07 · #0737bb

Split-complementary

Open in tool →

#07bb31 · #0791bb

#91bb07 · #07bb8b · #3107bb

Contrast

#bb0737 as textRatioAAAA largeAAAFix
Aaon white
6.57:1passpassfail
  • AAA: use #b10634 as the text (7.13:1)
Aaon black
3.2:1failpassfail
  • AA: use #e70844 as the text (4.52:1)
  • AAA: use #f9628a as the text (7.14:1)
  • AA: or shift the background to #d6d6d6 (4.52:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #bb0737 as the background.

Brands using this color

No public brand in the corpus uses this exact color yet. Extract a brand to add one.

Fonts for this mood

#bb0737 reads as warm, vivid, playful. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #bb0737
live endpoint

Point any MCP client at the shared colors endpoint and your agent gets the same engine as this page — generate_palette, check_contrast, analyze_color — read-only, no key. Every palette it proposes comes with a /palettes/new/… link: open it, lock what you like, paste the link back.

endpointhttps://mcp.brandsweets.com/colors/mcp
claude mcp add --transport http brandsweets-colors https://mcp.brandsweets.com/colors/mcp
try this prompt

analyze #bb0737 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/bb0737-c49ca2-62cb7c-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