#241121

CSS

:root {
  --shot-in-the-dark: #241121;
  --shot-in-the-dark-rgb: 36 17 33;
  --shot-in-the-dark-oklch: oklch(0.212 0.042 332.9);
}

.element {
  color: var(--shot-in-the-dark);
  background-color: hsl(309 36% 10%);
  border-color: oklch(0.212 0.042 332.9);
}

Tailwind CSS v4

@theme {
  --color-shot-in-the-dark: #241121;
  --color-shot-in-the-dark-50: #fdf1fa;
  --color-shot-in-the-dark-100: #f1e3ed;
  --color-shot-in-the-dark-200: #e0cedb;
  --color-shot-in-the-dark-300: #c6b0c0;
  --color-shot-in-the-dark-400: #ae96a9;
  --color-shot-in-the-dark-500: #987c92;
  --color-shot-in-the-dark-600: #80697c;
  --color-shot-in-the-dark-700: #675463;
  --color-shot-in-the-dark-800: #4b3d49;
  --color-shot-in-the-dark-900: #342a33;
  --color-shot-in-the-dark-950: #20181e;
}

SCSS

$shot-in-the-dark: #241121;
$shot-in-the-dark-rgb: 36, 17, 33;
$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);
}