#576D11

CSS

:root {
  --over-the-hills: #576d11;
  --over-the-hills-rgb: 87 109 17;
  --over-the-hills-oklch: oklch(0.499 0.115 123);
}

.element {
  color: var(--over-the-hills);
  background-color: hsl(74 73% 25%);
  border-color: oklch(0.499 0.115 123);
}

Tailwind CSS v4

@theme {
  --color-over-the-hills: #576d11;
  --color-over-the-hills-50: #edfcd8;
  --color-over-the-hills-100: #dfefc6;
  --color-over-the-hills-200: #c9dda8;
  --color-over-the-hills-300: #aac281;
  --color-over-the-hills-400: #92aa5a;
  --color-over-the-hills-500: #789231;
  --color-over-the-hills-600: #667c2b;
  --color-over-the-hills-700: #516322;
  --color-over-the-hills-800: #3d4815;
  --color-over-the-hills-900: #2a320d;
  --color-over-the-hills-950: #171e02;
}

SCSS

$over-the-hills: #576d11;
$over-the-hills-rgb: 87, 109, 17;
$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);
}