#1C1426

CSS

:root {
  --shot-in-the-dark: #1c1426;
  --shot-in-the-dark-rgb: 28 20 38;
  --shot-in-the-dark-oklch: oklch(0.211 0.036 303.9);
}

.element {
  color: var(--shot-in-the-dark);
  background-color: hsl(267 31% 11%);
  border-color: oklch(0.211 0.036 303.9);
}

Tailwind CSS v4

@theme {
  --color-shot-in-the-dark: #1c1426;
  --color-shot-in-the-dark-50: #f8f3fe;
  --color-shot-in-the-dark-100: #ebe5f2;
  --color-shot-in-the-dark-200: #d8d1e1;
  --color-shot-in-the-dark-300: #bcb3c7;
  --color-shot-in-the-dark-400: #a39ab0;
  --color-shot-in-the-dark-500: #8b819a;
  --color-shot-in-the-dark-600: #766d82;
  --color-shot-in-the-dark-700: #5e5768;
  --color-shot-in-the-dark-800: #45404d;
  --color-shot-in-the-dark-900: #2f2c36;
  --color-shot-in-the-dark-950: #1c1921;
}

SCSS

$shot-in-the-dark: #1c1426;
$shot-in-the-dark-rgb: 28, 20, 38;
$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);
}