Color

#d8181b

#d8181b
hex#d8181b
rgbrgb(216, 24, 27)
hslhsl(359, 80%, 47%)
oklchoklch(0.562 0.219 27.8)
Closest name: Angry Tomato (#d82029)Relative luminance 0.1533

Colors that go with #d8181b

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 →

#18d8d5

#d8187b · #d87518

#1bd818 · #181bd8

Split-complementary

Open in tool →

#18d875 · #187bd8

#7bd818 · #18d8d5 · #7518d8

Contrast

#d8181b as textRatioAAAA largeAAAFix
Aaon white
5.16:1passpassfail
  • AAA: use #ae1316 as the text (7.23:1)
Aaon black
4.07:1failpassfail
  • AA: use #e6191d as the text (4.52:1)
  • AAA: use #ef6c6e as the text (7.04:1)
  • AA: or shift the background to #f0f0f0 (4.53:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #d8181b as the background.

Brands using this color

Fonts for this mood

#d8181b reads as warm, vivid, playful. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #d8181b
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 #d8181b and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/d8181b-c4a09c-62cb96-2d251f-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