Color

#f40f0b

#f40f0b
hex#f40f0b
rgbrgb(244, 15, 11)
hslhsl(1, 91%, 50%)
oklchoklch(0.611 0.246 29.1)
Closest name: Assassin’s Red (#f60206)Relative luminance 0.196

Colors that go with #f40f0b

Charcoal, Royal Blue and Sea Green 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 →

#0bf0f4

#f40b7c · #f4830b

#0bf40f · #0f0bf4

Split-complementary

Open in tool →

#0bf483 · #0b7cf4

#7cf40b · #0bf0f4 · #830bf4

Contrast

#f40f0b as textRatioAAAA largeAAAFix
Aaon white
4.27:1failpassfail
  • AA: use #ea0f0b as the text (4.59:1)
  • AAA: use #b40b08 as the text (7.02:1)
  • AA: or shift the background to #0d0d0d (4.55:1)
Aaon black
4.92:1passpassfail
  • AAA: use #f86663 as the text (7.07:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #f40f0b as the background.

Brands using this color

Fonts for this mood

#f40f0b reads as warm, vivid, playful. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #f40f0b
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 #f40f0b and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/f40f0b-c4a19c-62cb9a-2d261f-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