Color

#d83137

#d83137
hex#d83137
rgbrgb(216, 49, 55)
hslhsl(358, 68%, 52%)
oklchoklch(0.579 0.203 24.7)
Closest name: Angry Tomato (#d82029)Relative luminance 0.1707

Colors that go with #d83137

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 →

#31d8d2

#d8318a · #d87f31

#37d831 · #3137d8

Split-complementary

Open in tool →

#31d87f · #318ad8

#8ad831 · #31d8d2 · #7f31d8

Contrast

#d83137 as textRatioAAAA largeAAAFix
Aaon white
4.76:1passpassfail
  • AAA: use #ab2125 as the text (7.06:1)
Aaon black
4.41:1failpassfail
  • AA: use #d9363b as the text (4.54:1)
  • AAA: use #e5767a as the text (7.2:1)
  • AA: or shift the background to #fafafa (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 #d83137 as the background.

Brands using this color

Fonts for this mood

#d83137 reads as warm, vivid, playful. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #d83137
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 #d83137 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/d83137-c49f9c-62cb95-2d251f-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