#131915

CSS

:root {
  --jedi-night: #131915;
  --jedi-night-rgb: 19 25 21;
  --jedi-night-oklch: oklch(0.206 0.012 156);
}

.element {
  color: var(--jedi-night);
  background-color: hsl(140 14% 9%);
  border-color: oklch(0.206 0.012 156);
}

Tailwind CSS v4

@theme {
  --color-jedi-night: #131915;
  --color-jedi-night-50: #f2f6f4;
  --color-jedi-night-100: #e5e9e6;
  --color-jedi-night-200: #d0d6d2;
  --color-jedi-night-300: #b3b9b5;
  --color-jedi-night-400: #99a19b;
  --color-jedi-night-500: #808983;
  --color-jedi-night-600: #6c746f;
  --color-jedi-night-700: #575c59;
  --color-jedi-night-800: #3f4440;
  --color-jedi-night-900: #2c2f2c;
  --color-jedi-night-950: #191b19;
}

SCSS

$jedi-night: #131915;
$jedi-night-rgb: 19, 25, 21;
$jedi-night-light: mix(#fff, $jedi-night, 20%);
$jedi-night-dark: mix(#000, $jedi-night, 20%);

.element {
  color: $jedi-night;
  box-shadow: 0 0 0 2px rgba($jedi-night, 0.35);
}