Color

#b4403c

#b4403c
hex#b4403c
rgbrgb(180, 64, 60)
hslhsl(2, 50%, 47%)
oklchoklch(0.533 0.152 25.6)
Closest name: Barbarossa (#a84734)Relative luminance 0.137

Colors that go with #b4403c

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 #b4403c

Tints & shades

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

Harmonies

Complementary

Open in tool →

#3cb0b4

#b43c74 · #b47c3c

#3cb440 · #403cb4

Split-complementary

Open in tool →

#3cb47c · #3c74b4

#74b43c · #3cb0b4 · #7c3cb4

Contrast

#b4403c as textRatioAAAA largeAAAFix
Aaon white
5.62:1passpassfail
  • AAA: use #993633 as the text (7.17:1)
Aaon black
3.74:1failpassfail
  • AA: use #c34f4b as the text (4.54:1)
  • AAA: use #d4807d as the text (7.18:1)
  • AA: or shift the background to #e8e8e8 (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 #b4403c as the background.

Brands using this color

Palettes built around it

Fonts for this mood

#b4403c reads as warm. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #b4403c
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 #b4403c and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/b4403c-c4a29c-62cb9c-2d261f-f1e9ed?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