#4E8338

CSS

:root {
  --the-legend-of-green: #4e8338;
  --the-legend-of-green-rgb: 78 131 56;
  --the-legend-of-green-oklch: oklch(0.555 0.121 137.4);
}

.element {
  color: var(--the-legend-of-green);
  background-color: hsl(102 40% 37%);
  border-color: oklch(0.555 0.121 137.4);
}

Tailwind CSS v4

@theme {
  --color-the-legend-of-green: #4e8338;
  --color-the-legend-of-green-50: #e4fedd;
  --color-the-legend-of-green-100: #d4f2cc;
  --color-the-legend-of-green-200: #bae1b0;
  --color-the-legend-of-green-300: #97c78b;
  --color-the-legend-of-green-400: #7baf67;
  --color-the-legend-of-green-500: #5c9844;
  --color-the-legend-of-green-600: #4f813a;
  --color-the-legend-of-green-700: #3f672e;
  --color-the-legend-of-green-800: #2f4b1e;
  --color-the-legend-of-green-900: #203414;
  --color-the-legend-of-green-950: #0f2006;
}

SCSS

$the-legend-of-green: #4e8338;
$the-legend-of-green-rgb: 78, 131, 56;
$the-legend-of-green-light: mix(#fff, $the-legend-of-green, 20%);
$the-legend-of-green-dark: mix(#000, $the-legend-of-green, 20%);

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