#59AE41

CSS

:root {
  --grass: #59ae41;
  --grass-rgb: 89 174 65;
  --grass-oklch: oklch(0.674 0.168 139.4);
}

.element {
  color: var(--grass);
  background-color: hsl(107 46% 47%);
  border-color: oklch(0.674 0.168 139.4);
}

Tailwind CSS v4

@theme {
  --color-grass: #59ae41;
  --color-grass-50: #dbffd5;
  --color-grass-100: #c9f7c2;
  --color-grass-200: #ace7a3;
  --color-grass-300: #85cd7b;
  --color-grass-400: #65b54f;
  --color-grass-500: #3e9f1c;
  --color-grass-600: #36861c;
  --color-grass-700: #2b6c16;
  --color-grass-800: #224f08;
  --color-grass-900: #163706;
  --color-grass-950: #072100;
}

SCSS

$grass: #59ae41;
$grass-rgb: 89, 174, 65;
$grass-light: mix(#fff, $grass, 20%);
$grass-dark: mix(#000, $grass, 20%);

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