#528241

CSS

:root {
  --shepherd-s-green: #528241;
  --shepherd-s-green-rgb: 82 130 65;
  --shepherd-s-green-oklch: oklch(0.556 0.108 138);
}

.element {
  color: var(--shepherd-s-green);
  background-color: hsl(104 33% 38%);
  border-color: oklch(0.556 0.108 138);
}

Tailwind CSS v4

@theme {
  --color-shepherd-s-green: #528241;
  --color-shepherd-s-green-50: #e5fde0;
  --color-shepherd-s-green-100: #d5f1cf;
  --color-shepherd-s-green-200: #bce0b4;
  --color-shepherd-s-green-300: #9ac591;
  --color-shepherd-s-green-400: #7eae6e;
  --color-shepherd-s-green-500: #61974d;
  --color-shepherd-s-green-600: #528042;
  --color-shepherd-s-green-700: #416635;
  --color-shepherd-s-green-800: #314b23;
  --color-shepherd-s-green-900: #213418;
  --color-shepherd-s-green-950: #101f08;
}

SCSS

$shepherd-s-green: #528241;
$shepherd-s-green-rgb: 82, 130, 65;
$shepherd-s-green-light: mix(#fff, $shepherd-s-green, 20%);
$shepherd-s-green-dark: mix(#000, $shepherd-s-green, 20%);

.element {
  color: $shepherd-s-green;
  box-shadow: 0 0 0 2px rgba($shepherd-s-green, 0.35);
}