#DF2A31

CSS

:root {
  --red-handed: #df2a31;
  --red-handed-rgb: 223 42 49;
  --red-handed-oklch: oklch(0.586 0.214 25.4);
}

.element {
  color: var(--red-handed);
  background-color: hsl(358 74% 52%);
  border-color: oklch(0.586 0.214 25.4);
}

Tailwind CSS v4

@theme {
  --color-red-handed: #df2a31;
  --color-red-handed-50: #ffded4;
  --color-red-handed-100: #ffcdc1;
  --color-red-handed-200: #ffafa1;
  --color-red-handed-300: #ff8779;
  --color-red-handed-400: #ff5d58;
  --color-red-handed-500: #f42431;
  --color-red-handed-600: #ce232b;
  --color-red-handed-700: #a61d22;
  --color-red-handed-800: #7c121b;
  --color-red-handed-900: #580c11;
  --color-red-handed-950: #3b0004;
}

SCSS

$red-handed: #df2a31;
$red-handed-rgb: 223, 42, 49;
$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);
}