Color

#ff5b1a

#ff5b1a
hex#ff5b1a
rgbrgb(255, 91, 26)
hslhsl(17, 100%, 55%)
oklchoklch(0.683 0.211 38.5)
Closest name: tomato (#ff6347)Relative luminance 0.2882

Tints & shades

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

Harmonies

Complementary

Open in tool →

#1abeff

#ff1a4b · #ffcd1a

#1aff5b · #5b1aff

Split-complementary

Open in tool →

#1affcd · #1a4bff

#4bff1a · #1abeff · #cd1aff

Contrast

#ff5b1a as textRatioAAAA largeAAAFix
Aaon white
3.1:1failpassfail
  • AA: use #d63d00 as the text (4.64:1)
  • AAA: use #a32e00 as the text (7.12:1)
  • AA: or shift the background to #2b2b2b (4.56:1)
Aaon black
6.76:1passpassfail
  • AAA: use #ff6224 as the text (7.02:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #ff5b1a as the background.

Brands using this color

Fonts for this mood

#ff5b1a reads as warm, vivid, playful. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #ff5b1a
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 #ff5b1a and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/ff5b1a-c4ac9c-62cbb6-2d291f-f1e9eb?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