Color

#a9041d

#a9041d
hex#a9041d
rgbrgb(169, 4, 29)
hslhsl(351, 95%, 34%)
oklchoklch(0.465 0.186 24.3)
Closest name: Blood Rush (#aa2222)Relative luminance 0.0861

Colors that go with #a9041d

Royal Blue, Teal and Amber 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 →

#04a990

#a9046f · #a93e04

#1da904 · #041da9

Split-complementary

Open in tool →

#04a93e · #046fa9

#6fa904 · #04a990 · #3e04a9

Contrast

#a9041d as textRatioAAAA largeAAAFix
Aaon white
7.71:1passpasspassPasses AAA — no fix needed.
Aaon black
2.72:1failfailfail
  • AA: use #ea0628 as the text (4.56:1)
  • AAA: use #fb6077 as the text (7.04:1)
  • AA: or shift the background to #c7c7c7 (4.56:1)
  • AAA: or shift the background to #f5f5f5 (7.08:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #a9041d as the background.

Brands using this color

Fonts for this mood

#a9041d reads as warm, vivid, playful. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #a9041d
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 #a9041d and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/a9041d-c49c9e-62cb89-2d231f-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