Color

#ff3429

#ff3429
hex#ff3429
rgbrgb(255, 52, 41)
hslhsl(3, 100%, 58%)
oklchoklch(0.649 0.237 28.9)
Closest name: red (#ff0000)Relative luminance 0.2388

Colors that go with #ff3429

Charcoal, Cadet Blue and Amber 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 →

#29f4ff

#ff2989 · #ff9f29

#29ff34 · #3429ff

Split-complementary

Open in tool →

#29ff9f · #2989ff

#89ff29 · #29f4ff · #9f29ff

Contrast

#ff3429 as textRatioAAAA largeAAAFix
Aaon white
3.64:1failpassfail
  • AA: use #eb0c00 as the text (4.58:1)
  • AAA: use #b30900 as the text (7.1:1)
  • AA: or shift the background to #1f1f1f (4.53:1)
Aaon black
5.78:1passpassfail
  • AAA: use #ff5f57 as the text (7.03:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #ff3429 as the background.

Brands using this color

Palettes built around it

Fonts for this mood

#ff3429 reads as warm, vivid, playful. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #ff3429
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 #ff3429 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/ff3429-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