#201324

CSS

:root {
  --shot-in-the-dark: #201324;
  --shot-in-the-dark-rgb: 32 19 36;
  --shot-in-the-dark-oklch: oklch(0.212 0.038 318);
}

.element {
  color: var(--shot-in-the-dark);
  background-color: hsl(286 31% 11%);
  border-color: oklch(0.212 0.038 318);
}

Tailwind CSS v4

@theme {
  --color-shot-in-the-dark: #201324;
  --color-shot-in-the-dark-50: #faf2fc;
  --color-shot-in-the-dark-100: #eee4f0;
  --color-shot-in-the-dark-200: #dccfde;
  --color-shot-in-the-dark-300: #c0b2c4;
  --color-shot-in-the-dark-400: #a898ad;
  --color-shot-in-the-dark-500: #917f97;
  --color-shot-in-the-dark-600: #7b6b7f;
  --color-shot-in-the-dark-700: #625666;
  --color-shot-in-the-dark-800: #483f4b;
  --color-shot-in-the-dark-900: #322b34;
  --color-shot-in-the-dark-950: #1e1820;
}

SCSS

$shot-in-the-dark: #201324;
$shot-in-the-dark-rgb: 32, 19, 36;
$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);
}