#425322

CSS

:root {
  --zen-garden-olive: #425322;
  --zen-garden-olive-rgb: 66 83 34;
  --zen-garden-olive-oklch: oklch(0.416 0.076 125.5);
}

.element {
  color: var(--zen-garden-olive);
  background-color: hsl(81 42% 23%);
  border-color: oklch(0.416 0.076 125.5);
}

Tailwind CSS v4

@theme {
  --color-zen-garden-olive: #425322;
  --color-zen-garden-olive-50: #effae3;
  --color-zen-garden-olive-100: #e1edd2;
  --color-zen-garden-olive-200: #cbdbb8;
  --color-zen-garden-olive-300: #adbf96;
  --color-zen-garden-olive-400: #94a776;
  --color-zen-garden-olive-500: #7a8f57;
  --color-zen-garden-olive-600: #67794a;
  --color-zen-garden-olive-700: #53613b;
  --color-zen-garden-olive-800: #3d4729;
  --color-zen-garden-olive-900: #2a311b;
  --color-zen-garden-olive-950: #181d0c;
}

SCSS

$zen-garden-olive: #425322;
$zen-garden-olive-rgb: 66, 83, 34;
$zen-garden-olive-light: mix(#fff, $zen-garden-olive, 20%);
$zen-garden-olive-dark: mix(#000, $zen-garden-olive, 20%);

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