Color

#e31902

#e31902
hex#e31902
rgbrgb(227, 25, 2)
hslhsl(6, 98%, 45%)
oklchoklch(0.582 0.23 30.4)
Closest name: Alarm (#ec0003)Relative luminance 0.1703

Colors that go with #e31902

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 →

#02cde3

#e3025c · #e38902

#02e319 · #1902e3

Split-complementary

Open in tool →

#02e389 · #025ce3

#5ce302 · #02cde3 · #8902e3

Contrast

#e31902 as textRatioAAAA largeAAAFix
Aaon white
4.77:1passpassfail
  • AAA: use #b11302 as the text (7.09:1)
Aaon black
4.41:1failpassfail
  • AA: use #e81902 as the text (4.57:1)
  • AAA: use #fd6453 as the text (7.12:1)
  • AA: or shift the background to #fafafa (4.57:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #e31902 as the background.

Brands using this color

Fonts for this mood

#e31902 reads as warm, vivid, playful. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #e31902
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 #e31902 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/e31902-c4a59c-62cba3-2d271f-f1e9ec?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