Color

#fd310d

#fd310d
hex#fd310d
rgbrgb(253, 49, 13)
hslhsl(9, 98%, 52%)
oklchoklch(0.642 0.24 31.7)
Closest name: red (#ff0000)Relative luminance 0.2311

Tints & shades

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

Harmonies

Complementary

Open in tool →

#0dd9fd

#fd0d61 · #fda90d

#0dfd31 · #310dfd

Split-complementary

Open in tool →

#0dfda9 · #0d61fd

#61fd0d · #0dd9fd · #a90dfd

Contrast

#fd310d as textRatioAAAA largeAAAFix
Aaon white
3.74:1failpassfail
  • AA: use #e32402 as the text (4.65:1)
  • AAA: use #ac1b02 as the text (7.21:1)
  • AA: or shift the background to #1c1c1c (4.56:1)
Aaon black
5.62:1passpassfail
  • AAA: use #fd6449 as the text (7.1:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #fd310d as the background.

Brands using this color

Palettes built around it

Fonts for this mood

#fd310d reads as warm, vivid, playful. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #fd310d
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 #fd310d and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/fd310d-c4a79c-62cba8-2d271f-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