Color

#b41204

#b41204
hex#b41204
rgbrgb(180, 18, 4)
hslhsl(5, 96%, 36%)
oklchoklch(0.489 0.193 30.1)
Closest name: All Systems Red (#b30103)Relative luminance 0.1014

Tints & shades

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

Harmonies

Complementary

Open in tool →

#04a5b4

#b4044d · #b46a04

#04b412 · #1204b4

Split-complementary

Open in tool →

#04b46a · #044db4

#4db404 · #04a5b4 · #6a04b4

Contrast

#b41204 as textRatioAAAA largeAAAFix
Aaon white
6.93:1passpassfail
  • AAA: use #af1204 as the text (7.21:1)
Aaon black
3.03:1failpassfail
  • AA: use #eb1805 as the text (4.67:1)
  • AAA: use #fc6355 as the text (7.06:1)
  • AA: or shift the background to #d1d1d1 (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 #b41204 as the background.

Brands using this color

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

Palettes built around it

Fonts for this mood

#b41204 reads as warm, vivid, playful. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #b41204
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 #b41204 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/b41204-c4a49c-62cba1-2d261f-f1e9ec?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