#51833C

CSS

:root {
  --shepherd-s-green: #51833c;
  --shepherd-s-green-rgb: 81 131 60;
  --shepherd-s-green-oklch: oklch(0.557 0.116 137.3);
}

.element {
  color: var(--shepherd-s-green);
  background-color: hsl(102 37% 37%);
  border-color: oklch(0.557 0.116 137.3);
}

Tailwind CSS v4

@theme {
  --color-shepherd-s-green: #51833c;
  --color-shepherd-s-green-50: #e5fede;
  --color-shepherd-s-green-100: #d5f2cd;
  --color-shepherd-s-green-200: #bbe1b2;
  --color-shepherd-s-green-300: #99c68d;
  --color-shepherd-s-green-400: #7dae6a;
  --color-shepherd-s-green-500: #5f9847;
  --color-shepherd-s-green-600: #51803d;
  --color-shepherd-s-green-700: #406731;
  --color-shepherd-s-green-800: #304b20;
  --color-shepherd-s-green-900: #213415;
  --color-shepherd-s-green-950: #101f07;
}

SCSS

$shepherd-s-green: #51833c;
$shepherd-s-green-rgb: 81, 131, 60;
$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);
}