#518040

CSS

:root {
  --shepherd-s-green: #518040;
  --shepherd-s-green-rgb: 81 128 64;
  --shepherd-s-green-oklch: oklch(0.55 0.107 137.9);
}

.element {
  color: var(--shepherd-s-green);
  background-color: hsl(104 33% 38%);
  border-color: oklch(0.55 0.107 137.9);
}

Tailwind CSS v4

@theme {
  --color-shepherd-s-green: #518040;
  --color-shepherd-s-green-50: #e6fde0;
  --color-shepherd-s-green-100: #d6f1d0;
  --color-shepherd-s-green-200: #bde0b5;
  --color-shepherd-s-green-300: #9bc591;
  --color-shepherd-s-green-400: #7fae6f;
  --color-shepherd-s-green-500: #61974e;
  --color-shepherd-s-green-600: #537f43;
  --color-shepherd-s-green-700: #426635;
  --color-shepherd-s-green-800: #314b24;
  --color-shepherd-s-green-900: #213418;
  --color-shepherd-s-green-950: #101f09;
}

SCSS

$shepherd-s-green: #518040;
$shepherd-s-green-rgb: 81, 128, 64;
$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);
}