Color

#d51532

#d51532
hex#d51532
rgbrgb(213, 21, 50)
hslhsl(351, 82%, 46%)
oklchoklch(0.557 0.216 22.5)
Closest name: Angry Tomato (#d82029)Relative luminance 0.1491

Colors that go with #d51532

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 →

#15d5b9

#d51592 · #d55815

#32d515 · #1532d5

Split-complementary

Open in tool →

#15d558 · #1592d5

#92d515 · #15d5b9 · #5815d5

Contrast

#d51532 as textRatioAAAA largeAAAFix
Aaon white
5.27:1passpassfail
  • AAA: use #b01129 as the text (7.1:1)
Aaon black
3.98:1failpassfail
  • AA: use #e81736 as the text (4.61:1)
  • AAA: use #f06a7f as the text (7.07:1)
  • 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 #d51532 as the background.

Brands using this color

Fonts for this mood

#d51532 reads as warm, vivid, playful. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #d51532
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 #d51532 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/d51532-c49c9e-62cb89-2d231f-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