#084013

CSS

:root {
  --realm-of-the-underworld: #084013;
  --realm-of-the-underworld-rgb: 8 64 19;
  --realm-of-the-underworld-oklch: oklch(0.326 0.092 145.9);
}

.element {
  color: var(--realm-of-the-underworld);
  background-color: hsl(132 78% 14%);
  border-color: oklch(0.326 0.092 145.9);
}

Tailwind CSS v4

@theme {
  --color-realm-of-the-underworld: #084013;
  --color-realm-of-the-underworld-50: #e4fde7;
  --color-realm-of-the-underworld-100: #d4f1d7;
  --color-realm-of-the-underworld-200: #bbe0be;
  --color-realm-of-the-underworld-300: #98c59d;
  --color-realm-of-the-underworld-400: #7bad7d;
  --color-realm-of-the-underworld-500: #5c9760;
  --color-realm-of-the-underworld-600: #4e7f52;
  --color-realm-of-the-underworld-700: #3e6641;
  --color-realm-of-the-underworld-800: #2e4b2d;
  --color-realm-of-the-underworld-900: #1f341f;
  --color-realm-of-the-underworld-950: #0f1f0e;
}

SCSS

$realm-of-the-underworld: #084013;
$realm-of-the-underworld-rgb: 8, 64, 19;
$realm-of-the-underworld-light: mix(#fff, $realm-of-the-underworld, 20%);
$realm-of-the-underworld-dark: mix(#000, $realm-of-the-underworld, 20%);

.element {
  color: $realm-of-the-underworld;
  box-shadow: 0 0 0 2px rgba($realm-of-the-underworld, 0.35);
}