#DC2D45

CSS

:root {
  --crossing-the-line: #dc2d45;
  --crossing-the-line-rgb: 220 45 69;
  --crossing-the-line-oklch: oklch(0.585 0.208 19.9);
}

.element {
  color: var(--crossing-the-line);
  background-color: hsl(352 71% 52%);
  border-color: oklch(0.585 0.208 19.9);
}

Tailwind CSS v4

@theme {
  --color-crossing-the-line: #dc2d45;
  --color-crossing-the-line-50: #ffdeda;
  --color-crossing-the-line-100: #ffcdc9;
  --color-crossing-the-line-200: #ffafac;
  --color-crossing-the-line-300: #ff8786;
  --color-crossing-the-line-400: #ff5e69;
  --color-crossing-the-line-500: #f12948;
  --color-crossing-the-line-600: #cb273e;
  --color-crossing-the-line-700: #a41f31;
  --color-crossing-the-line-800: #7a1426;
  --color-crossing-the-line-900: #560d19;
  --color-crossing-the-line-950: #3a000a;
}

SCSS

$crossing-the-line: #dc2d45;
$crossing-the-line-rgb: 220, 45, 69;
$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);
}