#133F21

CSS

:root {
  --queen-of-trees: #133f21;
  --queen-of-trees-rgb: 19 63 33;
  --queen-of-trees-oklch: oklch(0.328 0.071 150.9);
}

.element {
  color: var(--queen-of-trees);
  background-color: hsl(139 54% 16%);
  border-color: oklch(0.328 0.071 150.9);
}

Tailwind CSS v4

@theme {
  --color-queen-of-trees: #133f21;
  --color-queen-of-trees-50: #e7fcec;
  --color-queen-of-trees-100: #d7efdd;
  --color-queen-of-trees-200: #bedec6;
  --color-queen-of-trees-300: #9cc3a6;
  --color-queen-of-trees-400: #80ab89;
  --color-queen-of-trees-500: #62946e;
  --color-queen-of-trees-600: #547d5d;
  --color-queen-of-trees-700: #43644a;
  --color-queen-of-trees-800: #314935;
  --color-queen-of-trees-900: #213324;
  --color-queen-of-trees-950: #101f13;
}

SCSS

$queen-of-trees: #133f21;
$queen-of-trees-rgb: 19, 63, 33;
$queen-of-trees-light: mix(#fff, $queen-of-trees, 20%);
$queen-of-trees-dark: mix(#000, $queen-of-trees, 20%);

.element {
  color: $queen-of-trees;
  box-shadow: 0 0 0 2px rgba($queen-of-trees, 0.35);
}