#757848

CSS

:root {
  --tree-hugger: #757848;
  --tree-hugger-rgb: 117 120 72;
  --tree-hugger-oklch: oklch(0.558 0.068 111.5);
}

.element {
  color: var(--tree-hugger);
  background-color: hsl(64 25% 38%);
  border-color: oklch(0.558 0.068 111.5);
}

Tailwind CSS v4

@theme {
  --color-tree-hugger: #757848;
  --color-tree-hugger-50: #f5f8e2;
  --color-tree-hugger-100: #e7ebd1;
  --color-tree-hugger-200: #d4d8b7;
  --color-tree-hugger-300: #b7bc94;
  --color-tree-hugger-400: #9fa374;
  --color-tree-hugger-500: #878b55;
  --color-tree-hugger-600: #737548;
  --color-tree-hugger-700: #5c5e39;
  --color-tree-hugger-800: #444428;
  --color-tree-hugger-900: #2f2f1b;
  --color-tree-hugger-950: #1b1c0b;
}

SCSS

$tree-hugger: #757848;
$tree-hugger-rgb: 117, 120, 72;
$tree-hugger-light: mix(#fff, $tree-hugger, 20%);
$tree-hugger-dark: mix(#000, $tree-hugger, 20%);

.element {
  color: $tree-hugger;
  box-shadow: 0 0 0 2px rgba($tree-hugger, 0.35);
}