Color

#de2137

#de2137
hex#de2137
rgbrgb(222, 33, 55)
hslhsl(353, 74%, 50%)
oklchoklch(0.58 0.218 22.7)
Closest name: crimson (#dc143c)Relative luminance 0.1689

Colors that go with #de2137

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 →

#21dec8

#de2196 · #de6921

#37de21 · #2137de

Split-complementary

Open in tool →

#21de69 · #2196de

#96de21 · #21dec8 · #6921de

Contrast

#de2137 as textRatioAAAA largeAAAFix
Aaon white
4.8:1passpassfail
  • AAA: use #ad1a2b as the text (7.1:1)
Aaon black
4.38:1failpassfail
  • AA: use #df2a3f as the text (4.54:1)
  • AAA: use #ea717f as the text (7.17:1)
  • AA: or shift the background to #fafafa (4.59:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #de2137 as the background.

Brands using this color

Fonts for this mood

#de2137 reads as warm, vivid, playful. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #de2137
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 #de2137 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/de2137-c49c9c-62cb8c-2d241f-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