#5DAD3F

CSS

:root {
  --grass: #5dad3f;
  --grass-rgb: 93 173 63;
  --grass-oklch: oklch(0.673 0.166 138.2);
}

.element {
  color: var(--grass);
  background-color: hsl(104 47% 46%);
  border-color: oklch(0.673 0.166 138.2);
}

Tailwind CSS v4

@theme {
  --color-grass: #5dad3f;
  --color-grass-50: #ddffd5;
  --color-grass-100: #cbf6c2;
  --color-grass-200: #aee6a3;
  --color-grass-300: #88cc7a;
  --color-grass-400: #69b54e;
  --color-grass-500: #449e19;
  --color-grass-600: #3b8619;
  --color-grass-700: #2f6b14;
  --color-grass-800: #244e07;
  --color-grass-900: #183705;
  --color-grass-950: #092100;
}

SCSS

$grass: #5dad3f;
$grass-rgb: 93, 173, 63;
$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);
}