#6AB23D

CSS

:root {
  --grass: #6ab23d;
  --grass-rgb: 106 178 61;
  --grass-oklch: oklch(0.692 0.167 135.5);
}

.element {
  color: var(--grass);
  background-color: hsl(97 49% 47%);
  border-color: oklch(0.692 0.167 135.5);
}

Tailwind CSS v4

@theme {
  --color-grass: #6ab23d;
  --color-grass-50: #dfffd2;
  --color-grass-100: #cef6bf;
  --color-grass-200: #b2e59f;
  --color-grass-300: #8dcb75;
  --color-grass-400: #6fb447;
  --color-grass-500: #4e9d00;
  --color-grass-600: #438508;
  --color-grass-700: #356a09;
  --color-grass-800: #294e00;
  --color-grass-900: #1b3601;
  --color-grass-950: #0b2100;
}

SCSS

$grass: #6ab23d;
$grass-rgb: 106, 178, 61;
$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);
}