Color

#d31219

#d31219
hex#d31219
rgbrgb(211, 18, 25)
hslhsl(358, 84%, 45%)
oklchoklch(0.55 0.218 27.5)
Closest name: Angry Tomato (#d82029)Relative luminance 0.1435

Colors that go with #d31219

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 →

#12d3cd

#d31279 · #d36c12

#19d312 · #1219d3

Split-complementary

Open in tool →

#12d36c · #1279d3

#79d312 · #12d3cd · #6c12d3

Contrast

#d31219 as textRatioAAAA largeAAAFix
Aaon white
5.43:1passpassfail
  • AAA: use #b21015 as the text (7.05:1)
Aaon black
3.87:1failpassfail
  • AA: use #eb141c as the text (4.65:1)
  • AAA: use #f2696d as the text (7.02:1)
  • AA: or shift the background to #ebebeb (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 #d31219 as the background.

Brands using this color

Fonts for this mood

#d31219 reads as warm, vivid, playful. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #d31219
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 #d31219 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/d31219-c49f9c-62cb95-2d251f-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