#E22134

CSS

:root {
  --red-handed: #e22134;
  --red-handed-rgb: 226 33 52;
  --red-handed-oklch: oklch(0.587 0.222 23.7);
}

.element {
  color: var(--red-handed);
  background-color: hsl(354 77% 51%);
  border-color: oklch(0.587 0.222 23.7);
}

Tailwind CSS v4

@theme {
  --color-red-handed: #e22134;
  --color-red-handed-50: #ffddd4;
  --color-red-handed-100: #ffcbc2;
  --color-red-handed-200: #ffada2;
  --color-red-handed-300: #ff847a;
  --color-red-handed-400: #ff595b;
  --color-red-handed-500: #f71534;
  --color-red-handed-600: #d01a2e;
  --color-red-handed-700: #a81624;
  --color-red-handed-800: #7e0c1c;
  --color-red-handed-900: #590812;
  --color-red-handed-950: #3c0005;
}

SCSS

$red-handed: #e22134;
$red-handed-rgb: 226, 33, 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);
}