Color

#aa180e

#aa180e
hex#aa180e
rgbrgb(170, 24, 14)
hslhsl(4, 85%, 36%)
oklchoklch(0.473 0.18 29.6)
Closest name: Blood Rush (#aa2222)Relative luminance 0.0923

Colors that go with #aa180e

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 →

#0e9faa

#aa0e51 · #aa660e

#0eaa18 · #180eaa

Split-complementary

Open in tool →

#0eaa66 · #0e51aa

#51aa0e · #0e9faa · #660eaa

Contrast

#aa180e as textRatioAAAA largeAAAFix
Aaon white
7.38:1passpasspassPasses AAA — no fix needed.
Aaon black
2.85:1failfailfail
  • AA: use #e72113 as the text (4.62:1)
  • AAA: use #f26d63 as the text (7.14:1)
  • AA: or shift the background to #cccccc (4.59:1)
  • AAA: or shift the background to #fafafa (7.07:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #aa180e as the background.

Brands using this color

Fonts for this mood

#aa180e reads as warm, vivid, playful. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #aa180e
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 #aa180e and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/aa180e-c4a39c-62cb9f-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