Color

#ef2e2e

#ef2e2e
hex#ef2e2e
rgbrgb(239, 46, 46)
hslhsl(0, 86%, 56%)
oklchoklch(0.617 0.226 27.1)
Closest name: Arcade Fire (#ee3311)Relative luminance 0.205

Colors that go with #ef2e2e

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 →

#2eefef

#ef2e8f · #ef8f2e

#2eef2e · #2e2eef

Split-complementary

Open in tool →

#2eef8f · #2e8fef

#8fef2e · #2eefef · #8f2eef

Contrast

#ef2e2e as textRatioAAAA largeAAAFix
Aaon white
4.12:1failpassfail
  • AA: use #e81111 as the text (4.65:1)
  • AAA: use #af0d0d as the text (7.28:1)
  • AA: or shift the background to #121212 (4.55:1)
Aaon black
5.1:1passpassfail
  • AAA: use #f46c6c as the text (7.21:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #ef2e2e as the background.

Brands using this color

Fonts for this mood

#ef2e2e reads as warm, vivid, playful. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #ef2e2e
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 #ef2e2e and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/ef2e2e-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