Color

#a71b1d

#a71b1d
hex#a71b1d
rgbrgb(167, 27, 29)
hslhsl(359, 72%, 38%)
oklchoklch(0.471 0.174 26.7)
Closest name: Blood Rush (#aa2222)Relative luminance 0.0909

Colors that go with #a71b1d

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 →

#1ba7a4

#a71b63 · #a75f1b

#1da71b · #1b1da7

Split-complementary

Open in tool →

#1ba75f · #1b63a7

#63a71b · #1ba7a4 · #5f1ba7

Contrast

#a71b1d as textRatioAAAA largeAAAFix
Aaon white
7.45:1passpasspassPasses AAA — no fix needed.
Aaon black
2.82:1failfailfail
  • AA: use #dd3134 as the text (4.56:1)
  • AAA: use #e87375 as the text (7.14:1)
  • AA: or shift the background to #c9c9c9 (4.5:1)
  • AAA: or shift the background to #fafafa (7.14:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #a71b1d as the background.

Brands using this color

Fonts for this mood

#a71b1d reads as warm, vivid, playful. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #a71b1d
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 #a71b1d and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/a71b1d-c4a09c-62cb96-2d251f-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