Color

#c81e51

#c81e51
hex#c81e51
rgbrgb(200, 30, 81)
hslhsl(342, 74%, 45%)
oklchoklch(0.543 0.201 11.3)
Closest name: Akari Red (#c90b42)Relative luminance 0.138

Colors that go with #c81e51

Denim, 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 →

#1ec895

#c81ea6 · #c8401e

#51c81e · #1e51c8

Split-complementary

Open in tool →

#1ec840 · #1ea6c8

#a6c81e · #1ec895 · #401ec8

Contrast

#c81e51 as textRatioAAAA largeAAAFix
Aaon white
5.58:1passpassfail
  • AAA: use #a91944 as the text (7.22:1)
Aaon black
3.76:1failpassfail
  • AA: use #df265d as the text (4.57:1)
  • AAA: use #e96d92 as the text (7.07:1)
  • AA: or shift the background to #e8e8e8 (4.56:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #c81e51 as the background.

Brands using this color

Fonts for this mood

#c81e51 reads as warm, vivid, playful. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #c81e51
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 #c81e51 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/c81e51-c49ca3-62cb79-2d211f-f1e9ef?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