Color

#a5091d

#a5091d
hex#a5091d
rgbrgb(165, 9, 29)
hslhsl(352, 90%, 34%)
oklchoklch(0.458 0.181 24.4)
Closest name: Bleeding Crimson (#9b1414)Relative luminance 0.0828

Colors that go with #a5091d

Royal Blue, Teal and Crimson 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.

Tints & shades

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

Harmonies

Complementary

Open in tool →

#09a590

#a5096c · #a54209

#1da509 · #091da5

Split-complementary

Open in tool →

#09a542 · #096ca5

#6ca509 · #09a590 · #4209a5

Contrast

#a5091d as textRatioAAAA largeAAAFix
Aaon white
7.9:1passpasspassPasses AAA — no fix needed.
Aaon black
2.66:1failfailfail
  • AA: use #e90c2a as the text (4.55:1)
  • AAA: use #f76478 as the text (7.05:1)
  • AA: or shift the background to #c4c4c4 (4.53:1)
  • AAA: or shift the background to #f2f2f2 (7.06:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #a5091d as the background.

Brands using this color

Fonts for this mood

#a5091d reads as warm, vivid, playful. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #a5091d
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 #a5091d and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/a5091d-c49c9d-62cb8a-2d231f-f1e9ee?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