#DB3134

CSS

:root {
  --red-handed: #db3134;
  --red-handed-rgb: 219 49 52;
  --red-handed-oklch: oklch(0.584 0.206 25.6);
}

.element {
  color: var(--red-handed);
  background-color: hsl(359 70% 53%);
  border-color: oklch(0.584 0.206 25.6);
}

Tailwind CSS v4

@theme {
  --color-red-handed: #db3134;
  --color-red-handed-50: #ffdfd5;
  --color-red-handed-100: #ffcec2;
  --color-red-handed-200: #ffb1a3;
  --color-red-handed-300: #ff897b;
  --color-red-handed-400: #ff615b;
  --color-red-handed-500: #f02f35;
  --color-red-handed-600: #cb2b2e;
  --color-red-handed-700: #a32325;
  --color-red-handed-800: #7a161c;
  --color-red-handed-900: #560f12;
  --color-red-handed-950: #3a0105;
}

SCSS

$red-handed: #db3134;
$red-handed-rgb: 219, 49, 52;
$red-handed-light: mix(#fff, $red-handed, 20%);
$red-handed-dark: mix(#000, $red-handed, 20%);

.element {
  color: $red-handed;
  box-shadow: 0 0 0 2px rgba($red-handed, 0.35);
}