#5C751C

CSS

:root {
  --over-the-hills: #5c751c;
  --over-the-hills-rgb: 92 117 28;
  --over-the-hills-oklch: oklch(0.525 0.117 124.2);
}

.element {
  color: var(--over-the-hills);
  background-color: hsl(77 61% 28%);
  border-color: oklch(0.525 0.117 124.2);
}

Tailwind CSS v4

@theme {
  --color-over-the-hills: #5c751c;
  --color-over-the-hills-50: #edfcd8;
  --color-over-the-hills-100: #def0c6;
  --color-over-the-hills-200: #c7dea8;
  --color-over-the-hills-300: #a8c381;
  --color-over-the-hills-400: #90aa5a;
  --color-over-the-hills-500: #769331;
  --color-over-the-hills-600: #647c2b;
  --color-over-the-hills-700: #506322;
  --color-over-the-hills-800: #3b4815;
  --color-over-the-hills-900: #29320d;
  --color-over-the-hills-950: #171e02;
}

SCSS

$over-the-hills: #5c751c;
$over-the-hills-rgb: 92, 117, 28;
$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);
}