#121912

CSS

:root {
  --jedi-night: #121912;
  --jedi-night-rgb: 18 25 18;
  --jedi-night-oklch: oklch(0.204 0.017 144.9);
}

.element {
  color: var(--jedi-night);
  background-color: hsl(120 16% 8%);
  border-color: oklch(0.204 0.017 144.9);
}

Tailwind CSS v4

@theme {
  --color-jedi-night: #121912;
  --color-jedi-night-50: #f2f6f2;
  --color-jedi-night-100: #e4e9e4;
  --color-jedi-night-200: #d0d6d0;
  --color-jedi-night-300: #b2bab2;
  --color-jedi-night-400: #98a198;
  --color-jedi-night-500: #7f897f;
  --color-jedi-night-600: #6c746c;
  --color-jedi-night-700: #565d56;
  --color-jedi-night-800: #3f443f;
  --color-jedi-night-900: #2b2f2b;
  --color-jedi-night-950: #191b18;
}

SCSS

$jedi-night: #121912;
$jedi-night-rgb: 18, 25, 18;
$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);
}