Color

#d40819

#d40819
hex#d40819
rgbrgb(212, 8, 25)
hslhsl(355, 93%, 43%)
oklchoklch(0.549 0.221 27)
Closest name: Angry Tomato (#d82029)Relative luminance 0.1424

Colors that go with #d40819

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 →

#08d4c3

#d4087f · #d45d08

#19d408 · #0819d4

Split-complementary

Open in tool →

#08d45d · #087fd4

#7fd408 · #08d4c3 · #5d08d4

Contrast

#d40819 as textRatioAAAA largeAAAFix
Aaon white
5.46:1passpassfail
  • AAA: use #b10615 as the text (7.23:1)
Aaon black
3.85:1failpassfail
  • AA: use #ec091c as the text (4.62:1)
  • AAA: use #f9626e as the text (7:1)
  • AA: or shift the background to #ebebeb (4.58:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #d40819 as the background.

Brands using this color

Fonts for this mood

#d40819 reads as warm, vivid, playful. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #d40819
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 #d40819 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/d40819-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