#55AE3A

CSS

:root {
  --grass: #55ae3a;
  --grass-rgb: 85 174 58;
  --grass-oklch: oklch(0.671 0.175 139.2);
}

.element {
  color: var(--grass);
  background-color: hsl(106 50% 45%);
  border-color: oklch(0.671 0.175 139.2);
}

Tailwind CSS v4

@theme {
  --color-grass: #55ae3a;
  --color-grass-50: #daffd4;
  --color-grass-100: #c8f7c1;
  --color-grass-200: #aae7a1;
  --color-grass-300: #82cd77;
  --color-grass-400: #62b64a;
  --color-grass-500: #3a9f0c;
  --color-grass-600: #338712;
  --color-grass-700: #286c0f;
  --color-grass-800: #204f02;
  --color-grass-900: #153703;
  --color-grass-950: #062200;
}

SCSS

$grass: #55ae3a;
$grass-rgb: 85, 174, 58;
$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);
}