Color

#d3031b

#d3031b
hex#d3031b
rgbrgb(211, 3, 27)
hslhsl(353, 97%, 42%)
oklchoklch(0.546 0.221 26.4)
Closest name: Angry Tomato (#d82029)Relative luminance 0.1399

Colors that go with #d3031b

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 →

#03d3bb

#d30383 · #d35303

#1bd303 · #031bd3

Split-complementary

Open in tool →

#03d353 · #0383d3

#83d303 · #03d3bb · #5303d3

Contrast

#d3031b as textRatioAAAA largeAAAFix
Aaon white
5.53:1passpassfail
  • AAA: use #b50318 as the text (7.02:1)
Aaon black
3.8:1failpassfail
  • AA: use #ec041f as the text (4.6:1)
  • AAA: use #fd5e71 as the text (7.02:1)
  • AA: or shift the background to #e8e8e8 (4.51:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #d3031b as the background.

Brands using this color

Fonts for this mood

#d3031b reads as warm, vivid, playful. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #d3031b
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 #d3031b and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/d3031b-c49c9c-62cb8c-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