Color

#b43b13

#b43b13
hex#b43b13
rgbrgb(180, 59, 19)
hslhsl(15, 81%, 39%)
oklchoklch(0.523 0.164 36.9)
Closest name: Rust (#b7410e)Relative luminance 0.1288

Colors that go with #b43b13

Royal Blue, Sea Green and Steel Blue 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.

Real palettes that use #b43b13

Tints & shades

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

Harmonies

Complementary

Open in tool →

#138cb4

#b4133b · #b48c13

#13b43b · #3b13b4

Split-complementary

Open in tool →

#13b48c · #133bb4

#3bb413 · #138cb4 · #8c13b4

Contrast

#b43b13 as textRatioAAAA largeAAAFix
Aaon white
5.87:1passpassfail
  • AAA: use #9d3410 as the text (7.16:1)
Aaon black
3.58:1failpassfail
  • AA: use #d04416 as the text (4.52:1)
  • AAA: use #ec734b as the text (7.12:1)
  • AA: or shift the background to #e3e3e3 (4.58:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #b43b13 as the background.

Brands using this color

Palettes built around it

Fonts for this mood

#b43b13 reads as warm, vivid, playful. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #b43b13
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 #b43b13 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/b43b13-c4ab9c-62cbb2-2d291f-f1e9eb?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