#A8A583

CSS

:root {
  --olive-tree: #a8a583;
  --olive-tree-rgb: 168 165 131;
  --olive-tree-oklch: oklch(0.715 0.047 103.3);
}

.element {
  color: var(--olive-tree);
  background-color: hsl(55 18% 59%);
  border-color: oklch(0.715 0.047 103.3);
}

Tailwind CSS v4

@theme {
  --color-olive-tree: #a8a583;
  --color-olive-tree-50: #f7f6e7;
  --color-olive-tree-100: #eae9d7;
  --color-olive-tree-200: #d7d6bf;
  --color-olive-tree-300: #bab99e;
  --color-olive-tree-400: #a3a080;
  --color-olive-tree-500: #8b8863;
  --color-olive-tree-600: #767355;
  --color-olive-tree-700: #5e5c43;
  --color-olive-tree-800: #464330;
  --color-olive-tree-900: #302e21;
  --color-olive-tree-950: #1c1b10;
}

SCSS

$olive-tree: #a8a583;
$olive-tree-rgb: 168, 165, 131;
$olive-tree-light: mix(#fff, $olive-tree, 20%);
$olive-tree-dark: mix(#000, $olive-tree, 20%);

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