#134108

CSS

:root {
  --realm-of-the-underworld: #134108;
  --realm-of-the-underworld-rgb: 19 65 8;
  --realm-of-the-underworld-oklch: oklch(0.331 0.098 140.4);
}

.element {
  color: var(--realm-of-the-underworld);
  background-color: hsl(108 78% 14%);
  border-color: oklch(0.331 0.098 140.4);
}

Tailwind CSS v4

@theme {
  --color-realm-of-the-underworld: #134108;
  --color-realm-of-the-underworld-50: #e6fde3;
  --color-realm-of-the-underworld-100: #d6f1d3;
  --color-realm-of-the-underworld-200: #bde0b9;
  --color-realm-of-the-underworld-300: #9bc596;
  --color-realm-of-the-underworld-400: #7fad76;
  --color-realm-of-the-underworld-500: #619657;
  --color-realm-of-the-underworld-600: #537f4a;
  --color-realm-of-the-underworld-700: #42663b;
  --color-realm-of-the-underworld-800: #314a28;
  --color-realm-of-the-underworld-900: #21341b;
  --color-realm-of-the-underworld-950: #101f0b;
}

SCSS

$realm-of-the-underworld: #134108;
$realm-of-the-underworld-rgb: 19, 65, 8;
$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);
}