#1D1322

CSS

:root {
  --shot-in-the-dark: #1d1322;
  --shot-in-the-dark-rgb: 29 19 34;
  --shot-in-the-dark-oklch: oklch(0.207 0.032 314);
}

.element {
  color: var(--shot-in-the-dark);
  background-color: hsl(280 28% 10%);
  border-color: oklch(0.207 0.032 314);
}

Tailwind CSS v4

@theme {
  --color-shot-in-the-dark: #1d1322;
  --color-shot-in-the-dark-50: #f9f2fc;
  --color-shot-in-the-dark-100: #ece5ef;
  --color-shot-in-the-dark-200: #dad0de;
  --color-shot-in-the-dark-300: #beb3c3;
  --color-shot-in-the-dark-400: #a699ac;
  --color-shot-in-the-dark-500: #8e8096;
  --color-shot-in-the-dark-600: #786c7e;
  --color-shot-in-the-dark-700: #605765;
  --color-shot-in-the-dark-800: #463f4b;
  --color-shot-in-the-dark-900: #312c34;
  --color-shot-in-the-dark-950: #1d191f;
}

SCSS

$shot-in-the-dark: #1d1322;
$shot-in-the-dark-rgb: 29, 19, 34;
$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);
}