#8B9000

CSS

:root {
  --snakes-in-the-grass: #8b9000;
  --snakes-in-the-grass-rgb: 139 144 0;
  --snakes-in-the-grass-oklch: oklch(0.628 0.139 112.2);
}

.element {
  color: var(--snakes-in-the-grass);
  background-color: hsl(62 100% 28%);
  border-color: oklch(0.628 0.139 112.2);
}

Tailwind CSS v4

@theme {
  --color-snakes-in-the-grass: #8b9000;
  --color-snakes-in-the-grass-50: #f4facd;
  --color-snakes-in-the-grass-100: #e6eeb9;
  --color-snakes-in-the-grass-200: #d3dc96;
  --color-snakes-in-the-grass-300: #b6c069;
  --color-snakes-in-the-grass-400: #a0a637;
  --color-snakes-in-the-grass-500: #898e00;
  --color-snakes-in-the-grass-600: #747800;
  --color-snakes-in-the-grass-700: #5d6000;
  --color-snakes-in-the-grass-800: #464600;
  --color-snakes-in-the-grass-900: #303000;
  --color-snakes-in-the-grass-950: #1d1c00;
}

SCSS

$snakes-in-the-grass: #8b9000;
$snakes-in-the-grass-rgb: 139, 144, 0;
$snakes-in-the-grass-light: mix(#fff, $snakes-in-the-grass, 20%);
$snakes-in-the-grass-dark: mix(#000, $snakes-in-the-grass, 20%);

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