#627800

CSS

:root {
  --topiary-green: #627800;
  --topiary-green-rgb: 98 120 0;
  --topiary-green-oklch: oklch(0.536 0.129 121.5);
}

.element {
  color: var(--topiary-green);
  background-color: hsl(71 100% 24%);
  border-color: oklch(0.536 0.129 121.5);
}

Tailwind CSS v4

@theme {
  --color-topiary-green: #627800;
  --color-topiary-green-50: #edfcd4;
  --color-topiary-green-100: #dff0c0;
  --color-topiary-green-200: #c9dea1;
  --color-topiary-green-300: #aac377;
  --color-topiary-green-400: #92aa4d;
  --color-topiary-green-500: #799217;
  --color-topiary-green-600: #677c18;
  --color-topiary-green-700: #526314;
  --color-topiary-green-800: #3d4809;
  --color-topiary-green-900: #2a3206;
  --color-topiary-green-950: #181e00;
}

SCSS

$topiary-green: #627800;
$topiary-green-rgb: 98, 120, 0;
$topiary-green-light: mix(#fff, $topiary-green, 20%);
$topiary-green-dark: mix(#000, $topiary-green, 20%);

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