Color

#ad0000

#ad0000
hex#ad0000
rgbrgb(173, 0, 0)
hslhsl(0, 100%, 34%)
oklchoklch(0.469 0.193 29.2)
Closest name: All Systems Red (#b30103)Relative luminance 0.0888

Tints & shades

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

Harmonies

Complementary

Open in tool →

#00adad

#ad0057 · #ad5700

#00ad00 · #0000ad

Split-complementary

Open in tool →

#00ad57 · #0057ad

#57ad00 · #00adad · #5700ad

Contrast

#ad0000 as textRatioAAAA largeAAAFix
Aaon white
7.56:1passpasspassPasses AAA — no fix needed.
Aaon black
2.78:1failfailfail
  • AA: use #eb0000 as the text (4.53:1)
  • AAA: use #ff6161 as the text (7.13:1)
  • AA: or shift the background to #c9c9c9 (4.57:1)
  • AAA: or shift the background to #f7f7f7 (7.06:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #ad0000 as the background.

Brands using this color

No public brand in the corpus uses this exact color yet. Extract a brand to add one.

Fonts for this mood

#ad0000 reads as warm, vivid, playful. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #ad0000
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 #ad0000 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/ad0000-c4a19c-62cb98-2d251f-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