#164325

CSS

:root {
  --queen-of-trees: #164325;
  --queen-of-trees-rgb: 22 67 37;
  --queen-of-trees-oklch: oklch(0.343 0.072 151.6);
}

.element {
  color: var(--queen-of-trees);
  background-color: hsl(140 51% 17%);
  border-color: oklch(0.343 0.072 151.6);
}

Tailwind CSS v4

@theme {
  --color-queen-of-trees: #164325;
  --color-queen-of-trees-50: #e6fcec;
  --color-queen-of-trees-100: #d6efdd;
  --color-queen-of-trees-200: #bedec6;
  --color-queen-of-trees-300: #9cc3a7;
  --color-queen-of-trees-400: #7fab89;
  --color-queen-of-trees-500: #61946e;
  --color-queen-of-trees-600: #537d5d;
  --color-queen-of-trees-700: #42644b;
  --color-queen-of-trees-800: #304935;
  --color-queen-of-trees-900: #213324;
  --color-queen-of-trees-950: #101f13;
}

SCSS

$queen-of-trees: #164325;
$queen-of-trees-rgb: 22, 67, 37;
$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);
}