Color

#b33a09

#b33a09
hex#b33a09
rgbrgb(179, 58, 9)
hslhsl(17, 90%, 37%)
oklchoklch(0.52 0.165 38.1)
Closest name: Rust (#b7410e)Relative luminance 0.1263

Colors that go with #b33a09

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 #b33a09

Tints & shades

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

Harmonies

Complementary

Open in tool →

#0983b3

#b3092e · #b38e09

#09b33a · #3a09b3

Split-complementary

Open in tool →

#09b38e · #092eb3

#2eb309 · #0983b3 · #8e09b3

Contrast

#b33a09 as textRatioAAAA largeAAAFix
Aaon white
5.96:1passpassfail
  • AAA: use #a03308 as the text (7.07:1)
Aaon black
3.53:1failpassfail
  • AA: use #d5440b as the text (4.66:1)
  • AAA: use #f56e38 as the text (7.17:1)
  • AA: or shift the background to #e0e0e0 (4.51:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #b33a09 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

#b33a09 reads as warm, vivid, playful. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #b33a09
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 #b33a09 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/b33a09-c4ac9c-62cbb6-2d291f-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