Color

#aa1403

#aa1403
hex#aa1403
rgbrgb(170, 20, 3)
hslhsl(6, 97%, 34%)
oklchoklch(0.471 0.183 30.6)
Closest name: All Systems Red (#b30103)Relative luminance 0.0905

Colors that go with #aa1403

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 →

#039aab

#ab0346 · #ab6803

#03ab13 · #1303ab

Split-complementary

Open in tool →

#03ab68 · #0346ab

#46ab03 · #039aab · #6803ab

Contrast

#aa1403 as textRatioAAAA largeAAAFix
Aaon white
7.47:1passpasspassPasses AAA — no fix needed.
Aaon black
2.81:1failfailfail
  • AA: use #e71a04 as the text (4.55:1)
  • AAA: use #fc6554 as the text (7.13:1)
  • AA: or shift the background to #c9c9c9 (4.51:1)
  • AAA: or shift the background to #fafafa (7.16:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #aa1403 as the background.

Brands using this color

Fonts for this mood

#aa1403 reads as warm, vivid, playful. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #aa1403
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 #aa1403 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/aa1403-c4a59c-62cba3-2d271f-f1e9ec?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