Color

#ad0b0b

#ad0b0b
hex#ad0b0b
rgbrgb(173, 11, 11)
hslhsl(0, 88%, 36%)
oklchoklch(0.473 0.189 28.6)
Closest name: All Systems Red (#b30103)Relative luminance 0.0915

Tints & shades

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

Harmonies

Complementary

Open in tool →

#0badad

#ad0b5c · #ad5c0b

#0bad0b · #0b0bad

Split-complementary

Open in tool →

#0bad5c · #0b5cad

#5cad0b · #0badad · #5c0bad

Contrast

#ad0b0b as textRatioAAAA largeAAAFix
Aaon white
7.42:1passpasspassPasses AAA — no fix needed.
Aaon black
2.83:1failfailfail
  • AA: use #eb0f0f as the text (4.61:1)
  • AAA: use #f66a6a as the text (7.19:1)
  • AA: or shift the background to #cccccc (4.62:1)
  • AAA: or shift the background to #fafafa (7.11:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #ad0b0b as the background.

Brands using this color

Fonts for this mood

#ad0b0b reads as warm, vivid, playful. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #ad0b0b
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 #ad0b0b and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/ad0b0b-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