Color

#f53505

#f53505
hex#f53505
rgbrgb(245, 53, 5)
hslhsl(12, 96%, 49%)
oklchoklch(0.63 0.231 32.9)
Closest name: Arcade Fire (#ee3311)Relative luminance 0.2197

Colors that go with #f53505

Charcoal, Steel Blue and Cadet 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 →

#05c5f5

#f5054d · #f5ad05

#05f535 · #3505f5

Split-complementary

Open in tool →

#05f5ad · #054df5

#4df505 · #05c5f5 · #ad05f5

Contrast

#f53505 as textRatioAAAA largeAAAFix
Aaon white
3.89:1failpassfail
  • AA: use #e13105 as the text (4.52:1)
  • AAA: use #aa2503 as the text (7.06:1)
  • AA: or shift the background to #171717 (4.6:1)
Aaon black
5.39:1passpassfail
  • AAA: use #fb6641 as the text (7.08:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #f53505 as the background.

Brands using this color

Fonts for this mood

#f53505 reads as warm, vivid, playful. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #f53505
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 #f53505 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/f53505-c4a99c-62cbad-2d281f-f1e9ec?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