Color

#ff4133

#ff4133
hex#ff4133
rgbrgb(255, 65, 51)
hslhsl(4, 100%, 60%)
oklchoklch(0.659 0.228 29.1)
Closest name: Blood Burst (#ff474c)Relative luminance 0.2528

Colors that go with #ff4133

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 →

#33f1ff

#ff338b · #ffa733

#33ff41 · #4133ff

Split-complementary

Open in tool →

#33ffa7 · #338bff

#8bff33 · #33f1ff · #a733ff

Contrast

#ff4133 as textRatioAAAA largeAAAFix
Aaon white
3.47:1failpassfail
  • AA: use #eb1000 as the text (4.56:1)
  • AAA: use #b30c00 as the text (7.07:1)
  • AA: or shift the background to #212121 (4.64:1)
Aaon black
6.06:1passpassfail
  • AAA: use #ff6257 as the text (7.14:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #ff4133 as the background.

Brands using this color

Palettes built around it

Fonts for this mood

#ff4133 reads as warm, vivid, playful. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #ff4133
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 #ff4133 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/ff4133-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