#231127

CSS

:root {
  --shot-in-the-dark: #231127;
  --shot-in-the-dark-rgb: 35 17 39;
  --shot-in-the-dark-oklch: oklch(0.214 0.049 320.1);
}

.element {
  color: var(--shot-in-the-dark);
  background-color: hsl(289 39% 11%);
  border-color: oklch(0.214 0.049 320.1);
}

Tailwind CSS v4

@theme {
  --color-shot-in-the-dark: #231127;
  --color-shot-in-the-dark-50: #fcf1fe;
  --color-shot-in-the-dark-100: #f0e3f2;
  --color-shot-in-the-dark-200: #dfcee1;
  --color-shot-in-the-dark-300: #c4b0c6;
  --color-shot-in-the-dark-400: #ac96b1;
  --color-shot-in-the-dark-500: #957c9b;
  --color-shot-in-the-dark-600: #7e6983;
  --color-shot-in-the-dark-700: #655469;
  --color-shot-in-the-dark-800: #4a3d4d;
  --color-shot-in-the-dark-900: #332a36;
  --color-shot-in-the-dark-950: #1f1821;
}

SCSS

$shot-in-the-dark: #231127;
$shot-in-the-dark-rgb: 35, 17, 39;
$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);
}