Color

#e4013a

#e4013a
hex#e4013a
rgbrgb(228, 1, 58)
hslhsl(345, 99%, 45%)
oklchoklch(0.581 0.233 20.4)
Closest name: crimson (#dc143c)Relative luminance 0.1682

Colors that go with #e4013a

Charcoal, Royal Blue and Sea Green 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 →

#01e4ac

#e401ac · #e43a01

#3ae401 · #013ae4

Split-complementary

Open in tool →

#01e43a · #01ace4

#ace401 · #01e4ac · #3a01e4

Contrast

#e4013a as textRatioAAAA largeAAAFix
Aaon white
4.81:1passpassfail
  • AAA: use #b2012d as the text (7.15:1)
Aaon black
4.36:1failpassfail
  • AA: use #e9013b as the text (4.53:1)
  • AAA: use #fe5d85 as the text (7.12:1)
  • AA: or shift the background to #fafafa (4.61:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #e4013a as the background.

Brands using this color

Palettes built around it

Fonts for this mood

#e4013a reads as warm, vivid, playful. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #e4013a
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 #e4013a and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/e4013a-c49ca1-62cb7e-2d221f-f1e9ef?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