#1C1429

CSS

:root {
  --shot-in-the-dark: #1c1429;
  --shot-in-the-dark-rgb: 28 20 41;
  --shot-in-the-dark-oklch: oklch(0.212 0.042 300.5);
}

.element {
  color: var(--shot-in-the-dark);
  background-color: hsl(263 34% 12%);
  border-color: oklch(0.212 0.042 300.5);
}

Tailwind CSS v4

@theme {
  --color-shot-in-the-dark: #1c1429;
  --color-shot-in-the-dark-50: #f7f3ff;
  --color-shot-in-the-dark-100: #eae5f4;
  --color-shot-in-the-dark-200: #d7d0e3;
  --color-shot-in-the-dark-300: #bbb3ca;
  --color-shot-in-the-dark-400: #a299b4;
  --color-shot-in-the-dark-500: #8a809e;
  --color-shot-in-the-dark-600: #756d86;
  --color-shot-in-the-dark-700: #5e576b;
  --color-shot-in-the-dark-800: #443f4f;
  --color-shot-in-the-dark-900: #2f2c37;
  --color-shot-in-the-dark-950: #1c1922;
}

SCSS

$shot-in-the-dark: #1c1429;
$shot-in-the-dark-rgb: 28, 20, 41;
$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);
}