#406800

CSS

:root {
  --over-the-hills: #406800;
  --over-the-hills-rgb: 64 104 0;
  --over-the-hills-oklch: oklch(0.469 0.128 130.9);
}

.element {
  color: var(--over-the-hills);
  background-color: hsl(83 100% 20%);
  border-color: oklch(0.469 0.128 130.9);
}

Tailwind CSS v4

@theme {
  --color-over-the-hills: #406800;
  --color-over-the-hills-50: #e7fed8;
  --color-over-the-hills-100: #d8f2c6;
  --color-over-the-hills-200: #bfe1a8;
  --color-over-the-hills-300: #9ec681;
  --color-over-the-hills-400: #84ae5a;
  --color-over-the-hills-500: #679731;
  --color-over-the-hills-600: #587f2b;
  --color-over-the-hills-700: #466622;
  --color-over-the-hills-800: #344b15;
  --color-over-the-hills-900: #24340d;
  --color-over-the-hills-950: #131f02;
}

SCSS

$over-the-hills: #406800;
$over-the-hills-rgb: 64, 104, 0;
$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);
}