#154113

CSS

:root {
  --realm-of-the-underworld: #154113;
  --realm-of-the-underworld-rgb: 21 65 19;
  --realm-of-the-underworld-oklch: oklch(0.333 0.088 142.6);
}

.element {
  color: var(--realm-of-the-underworld);
  background-color: hsl(117 55% 16%);
  border-color: oklch(0.333 0.088 142.6);
}

Tailwind CSS v4

@theme {
  --color-realm-of-the-underworld: #154113;
  --color-realm-of-the-underworld-50: #e6fce6;
  --color-realm-of-the-underworld-100: #d7f0d6;
  --color-realm-of-the-underworld-200: #bedfbd;
  --color-realm-of-the-underworld-300: #9cc49c;
  --color-realm-of-the-underworld-400: #80ac7c;
  --color-realm-of-the-underworld-500: #62955e;
  --color-realm-of-the-underworld-600: #547e50;
  --color-realm-of-the-underworld-700: #436540;
  --color-realm-of-the-underworld-800: #314a2d;
  --color-realm-of-the-underworld-900: #21331e;
  --color-realm-of-the-underworld-950: #111f0e;
}

SCSS

$realm-of-the-underworld: #154113;
$realm-of-the-underworld-rgb: 21, 65, 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);
}