Color

#f01505

#f01505
hex#f01505
rgbrgb(240, 21, 5)
hslhsl(4, 96%, 48%)
oklchoklch(0.605 0.241 29.8)
Closest name: Assassin’s Red (#f60206)Relative luminance 0.1907

Colors that go with #f01505

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 →

#05e0f0

#f0056b · #f08a05

#05f015 · #1505f0

Split-complementary

Open in tool →

#05f08a · #056bf0

#6bf005 · #05e0f0 · #8a05f0

Contrast

#f01505 as textRatioAAAA largeAAAFix
Aaon white
4.36:1failpassfail
  • AA: use #eb1405 as the text (4.53:1)
  • AAA: use #af0f04 as the text (7.26:1)
  • AA: or shift the background to #0a0a0a (4.54:1)
Aaon black
4.81:1passpassfail
  • AAA: use #fc655a as the text (7.15:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #f01505 as the background.

Brands using this color

Fonts for this mood

#f01505 reads as warm, vivid, playful. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #f01505
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 #f01505 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/f01505-c4a39c-62cb9f-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