Color

#e10517

#e10517
hex#e10517
rgbrgb(225, 5, 23)
hslhsl(355, 96%, 45%)
oklchoklch(0.573 0.232 27.4)
Closest name: Angry Tomato (#d82029)Relative luminance 0.1618

Colors that go with #e10517

Charcoal, Royal Blue and Steel Blue 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 →

#05e1cf

#e10585 · #e16005

#17e105 · #0517e1

Split-complementary

Open in tool →

#05e160 · #0585e1

#85e105 · #05e1cf · #6005e1

Contrast

#e10517 as textRatioAAAA largeAAAFix
Aaon white
4.96:1passpassfail
  • AAA: use #b40412 as the text (7.08:1)
Aaon black
4.24:1failpassfail
  • AA: use #eb0518 as the text (4.57:1)
  • AAA: use #fc6471 as the text (7.2:1)
  • AA: or shift the background to #f5f5f5 (4.55:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #e10517 as the background.

Brands using this color

Fonts for this mood

#e10517 reads as warm, vivid, playful. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #e10517
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 #e10517 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/e10517-c49e9c-62cb8f-2d241f-f1e9ee?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