#21131E

CSS

:root {
  --shot-in-the-dark: #21131e;
  --shot-in-the-dark-rgb: 33 19 30;
  --shot-in-the-dark-oklch: oklch(0.21 0.03 334.6);
}

.element {
  color: var(--shot-in-the-dark);
  background-color: hsl(313 27% 10%);
  border-color: oklch(0.21 0.03 334.6);
}

Tailwind CSS v4

@theme {
  --color-shot-in-the-dark: #21131e;
  --color-shot-in-the-dark-50: #fbf2f8;
  --color-shot-in-the-dark-100: #efe4ec;
  --color-shot-in-the-dark-200: #ddd0d9;
  --color-shot-in-the-dark-300: #c2b2bd;
  --color-shot-in-the-dark-400: #aa98a6;
  --color-shot-in-the-dark-500: #937f8e;
  --color-shot-in-the-dark-600: #7d6c78;
  --color-shot-in-the-dark-700: #645660;
  --color-shot-in-the-dark-800: #493f47;
  --color-shot-in-the-dark-900: #332b31;
  --color-shot-in-the-dark-950: #1e181d;
}

SCSS

$shot-in-the-dark: #21131e;
$shot-in-the-dark-rgb: 33, 19, 30;
$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);
}