Color

GitHub Danger

#cf222e
hex#cf222e
rgbrgb(207, 34, 46)
hslhsl(356, 72%, 47%)
oklchoklch(0.552 0.205 24.5)
From GitHub brand colorsRelative luminance 0.1461

Tints & shades

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

Harmonies

Complementary

Open in tool →

#22cec3

#ce2283 · #ce6c22

#2dce22 · #222dce

Split-complementary

Open in tool →

#22ce6c · #2283ce

#83ce22 · #22cec3 · #6c22ce

Contrast

GitHub Danger as textRatioAAAA largeAAAFix
Aaon white
5.36:1passpassfail
  • AAA: use #ab1c25 as the text (7.18:1)
Aaon black
3.92:1failpassfail
  • AA: use #dd313c as the text (4.58:1)
  • AAA: use #e8737a as the text (7.16:1)
  • AA: or shift the background to #ededed (4.57:1)

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

Brands using this color

Fonts for this mood

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

mcpConnect your agent — build around GitHub Danger
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 #cf222e and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/cf222e-c49e9c-62cb91-2d241f-f1e9ee?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