#1C1425

CSS

:root {
  --shot-in-the-dark: #1c1425;
  --shot-in-the-dark-rgb: 28 20 37;
  --shot-in-the-dark-oklch: oklch(0.21 0.035 305.2);
}

.element {
  color: var(--shot-in-the-dark);
  background-color: hsl(268 30% 11%);
  border-color: oklch(0.21 0.035 305.2);
}

Tailwind CSS v4

@theme {
  --color-shot-in-the-dark: #1c1425;
  --color-shot-in-the-dark-50: #f8f3fd;
  --color-shot-in-the-dark-100: #ebe5f1;
  --color-shot-in-the-dark-200: #d8d1e0;
  --color-shot-in-the-dark-300: #bcb3c6;
  --color-shot-in-the-dark-400: #a39aaf;
  --color-shot-in-the-dark-500: #8b8199;
  --color-shot-in-the-dark-600: #766d81;
  --color-shot-in-the-dark-700: #5e5768;
  --color-shot-in-the-dark-800: #45404c;
  --color-shot-in-the-dark-900: #2f2c35;
  --color-shot-in-the-dark-950: #1c1920;
}

SCSS

$shot-in-the-dark: #1c1425;
$shot-in-the-dark-rgb: 28, 20, 37;
$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);
}