#03100D

CSS

:root {
  --jedi-night: #03100d;
  --jedi-night-rgb: 3 16 13;
  --jedi-night-oklch: oklch(0.158 0.022 178.6);
}

.element {
  color: var(--jedi-night);
  background-color: hsl(166 68% 4%);
  border-color: oklch(0.158 0.022 178.6);
}

Tailwind CSS v4

@theme {
  --color-jedi-night: #03100d;
  --color-jedi-night-50: #eff7f5;
  --color-jedi-night-100: #e0eae8;
  --color-jedi-night-200: #cbd7d5;
  --color-jedi-night-300: #acbbb8;
  --color-jedi-night-400: #91a39e;
  --color-jedi-night-500: #778b86;
  --color-jedi-night-600: #657672;
  --color-jedi-night-700: #515e5b;
  --color-jedi-night-800: #3b4542;
  --color-jedi-night-900: #28302e;
  --color-jedi-night-950: #161c1a;
}

SCSS

$jedi-night: #03100d;
$jedi-night-rgb: 3, 16, 13;
$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);
}