#587617

CSS

:root {
  --over-the-hills: #587617;
  --over-the-hills-rgb: 88 118 23;
  --over-the-hills-oklch: oklch(0.524 0.123 126.2);
}

.element {
  color: var(--over-the-hills);
  background-color: hsl(79 67% 28%);
  border-color: oklch(0.524 0.123 126.2);
}

Tailwind CSS v4

@theme {
  --color-over-the-hills: #587617;
  --color-over-the-hills-50: #ebfdd7;
  --color-over-the-hills-100: #dcf0c5;
  --color-over-the-hills-200: #c5dfa7;
  --color-over-the-hills-300: #a5c47f;
  --color-over-the-hills-400: #8cab58;
  --color-over-the-hills-500: #71942d;
  --color-over-the-hills-600: #607d28;
  --color-over-the-hills-700: #4d6420;
  --color-over-the-hills-800: #394913;
  --color-over-the-hills-900: #27330c;
  --color-over-the-hills-950: #151e01;
}

SCSS

$over-the-hills: #587617;
$over-the-hills-rgb: 88, 118, 23;
$over-the-hills-light: mix(#fff, $over-the-hills, 20%);
$over-the-hills-dark: mix(#000, $over-the-hills, 20%);

.element {
  color: $over-the-hills;
  box-shadow: 0 0 0 2px rgba($over-the-hills, 0.35);
}