Color

#ae0404

#ae0404
hex#ae0404
rgbrgb(174, 4, 4)
hslhsl(0, 96%, 35%)
oklchoklch(0.473 0.192 29)
Closest name: All Systems Red (#b30103)Relative luminance 0.0909

Colors that go with #ae0404

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 →

#04afaf

#af0459 · #af5904

#04af04 · #0404af

Split-complementary

Open in tool →

#04af59 · #0459af

#59af04 · #04afaf · #5904af

Contrast

#ae0404 as textRatioAAAA largeAAAFix
Aaon white
7.45:1passpasspassPasses AAA — no fix needed.
Aaon black
2.82:1failfailfail
  • AA: use #eb0505 as the text (4.56:1)
  • AAA: use #fc6464 as the text (7.15:1)
  • AA: or shift the background to #cccccc (4.64:1)
  • AAA: or shift the background to #fafafa (7.14:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #ae0404 as the background.

Brands using this color

Fonts for this mood

#ae0404 reads as warm, vivid, playful. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #ae0404
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 #ae0404 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/ae0404-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