Color

#f0150a

#f0150a
hex#f0150a
rgbrgb(240, 21, 10)
hslhsl(3, 92%, 49%)
oklchoklch(0.605 0.241 29.5)
Closest name: Assassin’s Red (#f60206)Relative luminance 0.1908

Colors that go with #f0150a

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 →

#0ae4f0

#f00a71 · #f0880a

#0af015 · #150af0

Split-complementary

Open in tool →

#0af088 · #0a71f0

#71f00a · #0ae4f0 · #880af0

Contrast

#f0150a as textRatioAAAA largeAAAFix
Aaon white
4.36:1failpassfail
  • AA: use #eb150a as the text (4.52:1)
  • AAA: use #b01007 as the text (7.18:1)
  • AA: or shift the background to #0a0a0a (4.54:1)
Aaon black
4.82:1passpassfail
  • AAA: use #f8655d as the text (7.01:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #f0150a as the background.

Brands using this color

Fonts for this mood

#f0150a reads as warm, vivid, playful. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #f0150a
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 #f0150a and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/f0150a-c4a39c-62cb9d-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