#1C1523

CSS

:root {
  --shot-in-the-dark: #1c1523;
  --shot-in-the-dark-rgb: 28 21 35;
  --shot-in-the-dark-oklch: oklch(0.211 0.029 306.9);
}

.element {
  color: var(--shot-in-the-dark);
  background-color: hsl(270 25% 11%);
  border-color: oklch(0.211 0.029 306.9);
}

Tailwind CSS v4

@theme {
  --color-shot-in-the-dark: #1c1523;
  --color-shot-in-the-dark-50: #f7f3fc;
  --color-shot-in-the-dark-100: #ebe5ef;
  --color-shot-in-the-dark-200: #d8d1de;
  --color-shot-in-the-dark-300: #bcb4c3;
  --color-shot-in-the-dark-400: #a39aac;
  --color-shot-in-the-dark-500: #8b8196;
  --color-shot-in-the-dark-600: #766e7e;
  --color-shot-in-the-dark-700: #5e5865;
  --color-shot-in-the-dark-800: #45404b;
  --color-shot-in-the-dark-900: #2f2c34;
  --color-shot-in-the-dark-950: #1c191f;
}

SCSS

$shot-in-the-dark: #1c1523;
$shot-in-the-dark-rgb: 28, 21, 35;
$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);
}