Red Menace

CSS

:root {
  --red-menace: #aa2121;
  --red-menace-rgb: 170 33 33;
  --red-menace-oklch: oklch(0.481 0.173 26.7);
}

.element {
  color: var(--red-menace);
  background-color: hsl(0 67% 40%);
  border-color: oklch(0.481 0.173 26.7);
}

Tailwind CSS v4

@theme {
  --color-red-menace: #aa2121;
  --color-red-menace-50: #ffe3d9;
  --color-red-menace-100: #ffd3c7;
  --color-red-menace-200: #ffb8aa;
  --color-red-menace-300: #ff9384;
  --color-red-menace-400: #f37065;
  --color-red-menace-500: #e24943;
  --color-red-menace-600: #bf3f39;
  --color-red-menace-700: #99332d;
  --color-red-menace-800: #732322;
  --color-red-menace-900: #511717;
  --color-red-menace-950: #350708;
}

SCSS

$red-menace: #aa2121;
$red-menace-rgb: 170, 33, 33;
$red-menace-light: mix(#fff, $red-menace, 20%);
$red-menace-dark: mix(#000, $red-menace, 20%);

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