Red Death

CSS

:root {
  --red-death: #ba2a1a;
  --red-death-rgb: 186 42 26;
  --red-death-oklch: oklch(0.517 0.183 30.4);
}

.element {
  color: var(--red-death);
  background-color: hsl(6 75% 42%);
  border-color: oklch(0.517 0.183 30.4);
}

Tailwind CSS v4

@theme {
  --color-red-death: #ba2a1a;
  --color-red-death-50: #ffe3d4;
  --color-red-death-100: #ffd2c1;
  --color-red-death-200: #ffb7a2;
  --color-red-death-300: #ff927a;
  --color-red-death-400: #f76d59;
  --color-red-death-500: #e64531;
  --color-red-death-600: #c23c2b;
  --color-red-death-700: #9c3022;
  --color-red-death-800: #75211a;
  --color-red-death-900: #521611;
  --color-red-death-950: #370604;
}

SCSS

$red-death: #ba2a1a;
$red-death-rgb: 186, 42, 26;
$red-death-light: mix(#fff, $red-death, 20%);
$red-death-dark: mix(#000, $red-death, 20%);

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