Color

#b5331c

#b5331c
hex#b5331c
rgbrgb(181, 51, 28)
hslhsl(9, 73%, 41%)
oklchoklch(0.517 0.17 32.4)
Closest name: Bloodshed (#ba271a)Relative luminance 0.1228

Colors that go with #b5331c

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 #b5331c

Tints & shades

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

Harmonies

Complementary

Open in tool →

#1c9eb5

#b51c52 · #b57f1c

#1cb533 · #331cb5

Split-complementary

Open in tool →

#1cb57f · #1c52b5

#52b51c · #1c9eb5 · #7f1cb5

Contrast

#b5331c as textRatioAAAA largeAAAFix
Aaon white
6.08:1passpassfail
  • AAA: use #a32e19 as the text (7.09:1)
Aaon black
3.46:1failpassfail
  • AA: use #d83d22 as the text (4.61:1)
  • AAA: use #e67460 as the text (7.03:1)
  • AA: or shift the background to #dedede (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 #b5331c as the background.

Brands using this color

Palettes built around it

Fonts for this mood

#b5331c reads as warm, vivid, playful. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #b5331c
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 #b5331c and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/b5331c-c4a79c-62cba8-2d271f-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