Color

#f11e21

#f11e21
hex#f11e21
rgbrgb(241, 30, 33)
hslhsl(359, 88%, 53%)
oklchoklch(0.611 0.237 27.7)
Closest name: Assassin’s Red (#f60206)Relative luminance 0.1974

Colors that go with #f11e21

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 →

#1ef1ed

#f11e8b · #f1841e

#21f11e · #1e21f1

Split-complementary

Open in tool →

#1ef184 · #1e8bf1

#8bf11e · #1ef1ed · #841ef1

Contrast

#f11e21 as textRatioAAAA largeAAAFix
Aaon white
4.24:1failpassfail
  • AA: use #eb0f13 as the text (4.56:1)
  • AAA: use #b10b0e as the text (7.18:1)
  • AA: or shift the background to #0f0f0f (4.52:1)
Aaon black
4.95:1passpassfail
  • AAA: use #f66a6d as the text (7.2:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #f11e21 as the background.

Brands using this color

Fonts for this mood

#f11e21 reads as warm, vivid, playful. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #f11e21
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 #f11e21 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/f11e21-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