#1D132A

CSS

:root {
  --shot-in-the-dark: #1d132a;
  --shot-in-the-dark-rgb: 29 19 42;
  --shot-in-the-dark-oklch: oklch(0.212 0.046 302.7);
}

.element {
  color: var(--shot-in-the-dark);
  background-color: hsl(266 38% 12%);
  border-color: oklch(0.212 0.046 302.7);
}

Tailwind CSS v4

@theme {
  --color-shot-in-the-dark: #1d132a;
  --color-shot-in-the-dark-50: #f8f2ff;
  --color-shot-in-the-dark-100: #ebe4f5;
  --color-shot-in-the-dark-200: #d8d0e4;
  --color-shot-in-the-dark-300: #bdb2cb;
  --color-shot-in-the-dark-400: #a398b5;
  --color-shot-in-the-dark-500: #8c7fa0;
  --color-shot-in-the-dark-600: #766c87;
  --color-shot-in-the-dark-700: #5f566c;
  --color-shot-in-the-dark-800: #453f50;
  --color-shot-in-the-dark-900: #302b38;
  --color-shot-in-the-dark-950: #1c1922;
}

SCSS

$shot-in-the-dark: #1d132a;
$shot-in-the-dark-rgb: 29, 19, 42;
$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);
}