Color

#ab0503

#ab0503
hex#ab0503
rgbrgb(171, 5, 3)
hslhsl(1, 97%, 34%)
oklchoklch(0.467 0.189 29.2)
Closest name: All Systems Red (#b30103)Relative luminance 0.0877

Colors that go with #ab0503

Royal Blue, Teal and Amber lead the list. Each partner is a real named colour with the reason it works — a wheel relationship, a neutral that carries it, or a pairing lifted from a palette or brand system that actually shipped — and every pair opens in the palette tool.

Tints & shades

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

Harmonies

Complementary

Open in tool →

#03a8ab

#ab0354 · #ab5a03

#03ab05 · #0503ab

Split-complementary

Open in tool →

#03ab5a · #0354ab

#54ab03 · #03a8ab · #5a03ab

Contrast

#ab0503 as textRatioAAAA largeAAAFix
Aaon white
7.62:1passpasspassPasses AAA — no fix needed.
Aaon black
2.75:1failfailfail
  • AA: use #ec0704 as the text (4.6:1)
  • AAA: use #fd615e as the text (7.05:1)
  • AA: or shift the background to #c7c7c7 (4.51:1)
  • AAA: or shift the background to #f7f7f7 (7.12:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #ab0503 as the background.

Brands using this color

Fonts for this mood

#ab0503 reads as warm, vivid, playful. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #ab0503
live endpoint

Point any MCP client at the shared colors endpoint and your agent gets the same engine as this page — direct_palette, edit_direction, check_palette, check_contrast — read-only, no key. Every direction it proposes comes with a /colors/d/… link: open it, lock what you like, paste the link back, and the agent edits rather than re-rolls.

endpointhttps://mcp.brandsweets.com/colors/mcp
claude mcp add --transport http brandsweets-colors https://mcp.brandsweets.com/colors/mcp
try this prompt

analyze #ab0503 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/ab0503-c4a19c-62cb9a-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