Color

#ad100b

#ad100b
hex#ad100b
rgbrgb(173, 16, 11)
hslhsl(2, 88%, 36%)
oklchoklch(0.475 0.187 29.1)
Closest name: All Systems Red (#b30103)Relative luminance 0.0928

Tints & shades

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

Harmonies

Complementary

Open in tool →

#0ba7ad

#ad0b56 · #ad610b

#0bad10 · #100bad

Split-complementary

Open in tool →

#0bad61 · #0b56ad

#56ad0b · #0ba7ad · #610bad

Contrast

#ad100b as textRatioAAAA largeAAAFix
Aaon white
7.35:1passpasspassPasses AAA — no fix needed.
Aaon black
2.86:1failfailfail
  • AA: use #eb160f as the text (4.65:1)
  • AAA: use #f56a66 as the text (7.14:1)
  • AA: or shift the background to #cccccc (4.58:1)
  • AAA: or shift the background to #fafafa (7.05:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #ad100b as the background.

Brands using this color

Fonts for this mood

#ad100b reads as warm, vivid, playful. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #ad100b
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 #ad100b and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/ad100b-c4a29c-62cb9c-2d261f-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