brandsweets

Color

#e51527

#e51527
hex#e51527
rgbrgb(229, 21, 39)
hslhsl(355, 83%, 49%)
oklchoklch(0.586 0.23 25.7)
Closest name: Alarm (#ec0003)Relative luminance 0.1734
WarmVividPlayfulBold
Open in palette toolCheck contrastWhat goes with it ↓

Colors that go with #e51527

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.

Real palettes that use #e51527

Pinterest· brandKFC· brandNASCAR· brandFormula 1· brand

Tints & shades

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

Harmonies

Complementary

Open in tool →
e5152715e5d3

#15e5d3

Analogous

Open in tool →
e51527e5158ee56c15

#e5158e · #e56c15

Triadic

Open in tool →
e5152727e5151527e5

#27e515 · #1527e5

Split-complementary

Open in tool →
e5152715e56c158ee5

#15e56c · #158ee5

Tetradic

Open in tool →
e515278ee51515e5d36c15e5

#8ee515 · #15e5d3 · #6c15e5

Contrast

#e51527 as textRatioAAAA largeAAAFix
Aaon white
4.7:1passpassfail
  • AAA: use #b1101e as the text (7.09:1)
Aaon black
4.47:1failpassfail
  • AA: use #e91627 as the text (4.61:1)
  • AAA: use #f16a75 as the text (7.06:1)
  • AA: or shift the background to #fafafa (4.5:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #e51527 as the background.

Brands using this color

Fonts for this mood

#e51527 reads as warm, vivid, playful. The font library is tagged with the same vocabulary:

Warm fonts →Playful fonts →Bold fonts →
mcpConnect your agent — build around #e51527
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 #e51527 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/e51527-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