Color

#ed3131

#ed3131
hex#ed3131
rgbrgb(237, 49, 49)
hslhsl(0, 84%, 56%)
oklchoklch(0.616 0.222 26.8)
Closest name: Arcade Fire (#ee3311)Relative luminance 0.2042

Colors that go with #ed3131

Charcoal, Royal Blue and Steel Blue 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 →

#31eded

#ed318f · #ed8f31

#31ed31 · #3131ed

Split-complementary

Open in tool →

#31ed8f · #318fed

#8fed31 · #31eded · #8f31ed

Contrast

#ed3131 as textRatioAAAA largeAAAFix
Aaon white
4.13:1failpassfail
  • AA: use #eb1414 as the text (4.52:1)
  • AAA: use #b21010 as the text (7.06:1)
  • AA: or shift the background to #121212 (4.54:1)
Aaon black
5.08:1passpassfail

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #ed3131 as the background.

Brands using this color

Fonts for this mood

#ed3131 reads as warm, vivid, playful. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #ed3131
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 #ed3131 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/ed3131-c4a19c-62cb98-2d251f-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