#DF2744

CSS

:root {
  --crossing-the-line: #df2744;
  --crossing-the-line-rgb: 223 39 68;
  --crossing-the-line-oklch: oklch(0.587 0.215 19.7);
}

.element {
  color: var(--crossing-the-line);
  background-color: hsl(351 74% 51%);
  border-color: oklch(0.587 0.215 19.7);
}

Tailwind CSS v4

@theme {
  --color-crossing-the-line: #df2744;
  --color-crossing-the-line-50: #ffddda;
  --color-crossing-the-line-100: #ffcbc8;
  --color-crossing-the-line-200: #ffaeab;
  --color-crossing-the-line-300: #ff8585;
  --color-crossing-the-line-400: #ff5b68;
  --color-crossing-the-line-500: #f31f47;
  --color-crossing-the-line-600: #ce203d;
  --color-crossing-the-line-700: #a61a30;
  --color-crossing-the-line-800: #7c1025;
  --color-crossing-the-line-900: #580b19;
  --color-crossing-the-line-950: #3b0009;
}

SCSS

$crossing-the-line: #df2744;
$crossing-the-line-rgb: 223, 39, 68;
$crossing-the-line-light: mix(#fff, $crossing-the-line, 20%);
$crossing-the-line-dark: mix(#000, $crossing-the-line, 20%);

.element {
  color: $crossing-the-line;
  box-shadow: 0 0 0 2px rgba($crossing-the-line, 0.35);
}