#67AB42

CSS

:root {
  --grass: #67ab42;
  --grass-rgb: 103 171 66;
  --grass-oklch: oklch(0.673 0.155 136.1);
}

.element {
  color: var(--grass);
  background-color: hsl(99 44% 46%);
  border-color: oklch(0.673 0.155 136.1);
}

Tailwind CSS v4

@theme {
  --color-grass: #67ab42;
  --color-grass-50: #e0ffd5;
  --color-grass-100: #cff5c3;
  --color-grass-200: #b4e5a4;
  --color-grass-300: #8fca7b;
  --color-grass-400: #72b350;
  --color-grass-500: #519c1f;
  --color-grass-600: #45841d;
  --color-grass-700: #376a18;
  --color-grass-800: #2a4d0a;
  --color-grass-900: #1c3607;
  --color-grass-950: #0c2100;
}

SCSS

$grass: #67ab42;
$grass-rgb: 103, 171, 66;
$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);
}