#211227

CSS

:root {
  --shot-in-the-dark: #211227;
  --shot-in-the-dark-rgb: 33 18 39;
  --shot-in-the-dark-oklch: oklch(0.213 0.045 315.8);
}

.element {
  color: var(--shot-in-the-dark);
  background-color: hsl(283 37% 11%);
  border-color: oklch(0.213 0.045 315.8);
}

Tailwind CSS v4

@theme {
  --color-shot-in-the-dark: #211227;
  --color-shot-in-the-dark-50: #fbf1fe;
  --color-shot-in-the-dark-100: #eee3f2;
  --color-shot-in-the-dark-200: #ddcfe1;
  --color-shot-in-the-dark-300: #c1b1c7;
  --color-shot-in-the-dark-400: #a997b1;
  --color-shot-in-the-dark-500: #927d9b;
  --color-shot-in-the-dark-600: #7c6a83;
  --color-shot-in-the-dark-700: #635569;
  --color-shot-in-the-dark-800: #483e4e;
  --color-shot-in-the-dark-900: #322b36;
  --color-shot-in-the-dark-950: #1e1821;
}

SCSS

$shot-in-the-dark: #211227;
$shot-in-the-dark-rgb: 33, 18, 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);
}