#231222

CSS

:root {
  --shot-in-the-dark: #231222;
  --shot-in-the-dark-rgb: 35 18 34;
  --shot-in-the-dark-oklch: oklch(0.213 0.04 328.9);
}

.element {
  color: var(--shot-in-the-dark);
  background-color: hsl(304 32% 10%);
  border-color: oklch(0.213 0.04 328.9);
}

Tailwind CSS v4

@theme {
  --color-shot-in-the-dark: #231222;
  --color-shot-in-the-dark-50: #fcf1fa;
  --color-shot-in-the-dark-100: #f0e3ee;
  --color-shot-in-the-dark-200: #dfcedc;
  --color-shot-in-the-dark-300: #c4b0c1;
  --color-shot-in-the-dark-400: #ac96aa;
  --color-shot-in-the-dark-500: #957d93;
  --color-shot-in-the-dark-600: #7e6a7d;
  --color-shot-in-the-dark-700: #655564;
  --color-shot-in-the-dark-800: #4a3e4a;
  --color-shot-in-the-dark-900: #332a33;
  --color-shot-in-the-dark-950: #1f181f;
}

SCSS

$shot-in-the-dark: #231222;
$shot-in-the-dark-rgb: 35, 18, 34;
$shot-in-the-dark-light: mix(#fff, $shot-in-the-dark, 20%);
$shot-in-the-dark-dark: mix(#000, $shot-in-the-dark, 20%);

.element {
  color: $shot-in-the-dark;
  box-shadow: 0 0 0 2px rgba($shot-in-the-dark, 0.35);
}