#18431F

CSS

:root {
  --queen-of-trees: #18431f;
  --queen-of-trees-rgb: 24 67 31;
  --queen-of-trees-oklch: oklch(0.342 0.078 146.9);
}

.element {
  color: var(--queen-of-trees);
  background-color: hsl(130 47% 18%);
  border-color: oklch(0.342 0.078 146.9);
}

Tailwind CSS v4

@theme {
  --color-queen-of-trees: #18431f;
  --color-queen-of-trees-50: #e7fce9;
  --color-queen-of-trees-100: #d7f0da;
  --color-queen-of-trees-200: #bedec2;
  --color-queen-of-trees-300: #9dc3a2;
  --color-queen-of-trees-400: #80ab84;
  --color-queen-of-trees-500: #639468;
  --color-queen-of-trees-600: #547d58;
  --color-queen-of-trees-700: #436446;
  --color-queen-of-trees-800: #314a31;
  --color-queen-of-trees-900: #213322;
  --color-queen-of-trees-950: #111f11;
}

SCSS

$queen-of-trees: #18431f;
$queen-of-trees-rgb: 24, 67, 31;
$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);
}