Color

#d30938

#d30938
hex#d30938
rgbrgb(211, 9, 56)
hslhsl(346, 92%, 43%)
oklchoklch(0.551 0.218 19.9)
Closest name: crimson (#dc143c)Relative luminance 0.1433

Colors that go with #d30938

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 →

#09d3a3

#d3099d · #d33f09

#38d309 · #0938d3

Split-complementary

Open in tool →

#09d33f · #099dd3

#9dd309 · #09d3a3 · #3f09d3

Contrast

#d30938 as textRatioAAAA largeAAAFix
Aaon white
5.43:1passpassfail
  • AAA: use #b0072f as the text (7.2:1)
Aaon black
3.87:1failpassfail
  • AA: use #eb0a3e as the text (4.65:1)
  • AAA: use #f86285 as the text (7.08:1)
  • AA: or shift the background to #ebebeb (4.56:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #d30938 as the background.

Brands using this color

Fonts for this mood

#d30938 reads as warm, vivid, playful. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #d30938
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 #d30938 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/d30938-c49ca1-62cb80-2d221f-f1e9ef?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