Color

#d31d2c

#d31d2c
hex#d31d2c
rgbrgb(211, 29, 44)
hslhsl(355, 76%, 47%)
oklchoklch(0.556 0.211 24.6)
Closest name: Angry Tomato (#d82029)Relative luminance 0.1491

Colors that go with #d31d2c

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 →

#1dd3c4

#d31d87 · #d3691d

#2cd31d · #1d2cd3

Split-complementary

Open in tool →

#1dd369 · #1d87d3

#87d31d · #1dd3c4 · #691dd3

Contrast

#d31d2c as textRatioAAAA largeAAAFix
Aaon white
5.27:1passpassfail
  • AAA: use #af1824 as the text (7.05:1)
Aaon black
3.98:1failpassfail
  • AA: use #e22837 as the text (4.59:1)
  • AAA: use #eb6f7a as the text (7.09:1)
  • AA: or shift the background to #ededed (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 #d31d2c as the background.

Brands using this color

Fonts for this mood

#d31d2c reads as warm, vivid, playful. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #d31d2c
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 #d31d2c and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/d31d2c-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