Color

#ff3d33

#ff3d33
hex#ff3d33
rgbrgb(255, 61, 51)
hslhsl(3, 100%, 60%)
oklchoklch(0.656 0.23 28.4)
Closest name: Blood Burst (#ff474c)Relative luminance 0.2484

Tints & shades

Every swatch is its own page — click any to analyze it.

Harmonies

Complementary

Open in tool →

#33f5ff

#ff338f · #ffa333

#33ff3d · #3d33ff

Split-complementary

Open in tool →

#33ffa3 · #338fff

#8fff33 · #33f5ff · #a333ff

Contrast

#ff3d33 as textRatioAAAA largeAAAFix
Aaon white
3.52:1failpassfail
  • AA: use #eb0c00 as the text (4.58:1)
  • AAA: use #b30900 as the text (7.1:1)
  • AA: or shift the background to #212121 (4.58:1)
Aaon black
5.97:1passpassfail
  • 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 #ff3d33 as the background.

Brands using this color

Palettes built around it

Fonts for this mood

#ff3d33 reads as warm, vivid, playful. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #ff3d33
live endpoint

Point any MCP client at the shared colors endpoint and your agent gets the same engine as this page — generate_palette, check_contrast, analyze_color — read-only, no key. Every palette it proposes comes with a /palettes/new/… link: open it, lock what you like, paste the link back.

endpointhttps://mcp.brandsweets.com/colors/mcp
claude mcp add --transport http brandsweets-colors https://mcp.brandsweets.com/colors/mcp
try this prompt

analyze #ff3d33 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/ff3d33-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