Color

#e42528

#e42528
hex#e42528
rgbrgb(228, 37, 40)
hslhsl(359, 78%, 52%)
oklchoklch(0.591 0.223 26.9)
Closest name: Alarm (#ec0003)Relative luminance 0.1797

Colors that go with #e42528

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 →

#25e4e1

#e42588 · #e48125

#28e425 · #2528e4

Split-complementary

Open in tool →

#25e481 · #2588e4

#88e425 · #25e4e1 · #8125e4

Contrast

#e42528 as textRatioAAAA largeAAAFix
Aaon white
4.57:1passpassfail
  • AAA: use #b11618 as the text (7.01:1)
Aaon black
4.59:1passpassfail
  • AAA: use #ed6e70 as the text (7.07:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #e42528 as the background.

Brands using this color

Fonts for this mood

#e42528 reads as warm, vivid, playful. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #e42528
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 #e42528 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/e42528-c4a09c-62cb96-2d251f-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