Color

#da101b

#da101b
hex#da101b
rgbrgb(218, 16, 27)
hslhsl(357, 86%, 46%)
oklchoklch(0.563 0.224 27.2)
Closest name: Angry Tomato (#d82029)Relative luminance 0.1536

Colors that go with #da101b

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 →

#10dad0

#da107f · #da6b10

#1bda10 · #101bda

Split-complementary

Open in tool →

#10da6b · #107fda

#7fda10 · #10dad0 · #6b10da

Contrast

#da101b as textRatioAAAA largeAAAFix
Aaon white
5.16:1passpassfail
  • AAA: use #af0d15 as the text (7.26:1)
Aaon black
4.07:1failpassfail
  • AA: use #e8111c as the text (4.53:1)
  • AAA: use #f4676e as the text (7.01:1)
  • 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 #da101b as the background.

Brands using this color

Fonts for this mood

#da101b reads as warm, vivid, playful. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #da101b
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 #da101b and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/da101b-c49f9c-62cb93-2d251f-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