#5B7500

CSS

:root {
  --topiary-green: #5b7500;
  --topiary-green-rgb: 91 117 0;
  --topiary-green-oklch: oklch(0.523 0.129 123.6);
}

.element {
  color: var(--topiary-green);
  background-color: hsl(73 100% 23%);
  border-color: oklch(0.523 0.129 123.6);
}

Tailwind CSS v4

@theme {
  --color-topiary-green: #5b7500;
  --color-topiary-green-50: #ecfcd5;
  --color-topiary-green-100: #ddf0c2;
  --color-topiary-green-200: #c7dfa2;
  --color-topiary-green-300: #a7c379;
  --color-topiary-green-400: #8fab50;
  --color-topiary-green-500: #75931e;
  --color-topiary-green-600: #637d1d;
  --color-topiary-green-700: #4f6417;
  --color-topiary-green-800: #3b490b;
  --color-topiary-green-900: #293307;
  --color-topiary-green-950: #171e00;
}

SCSS

$topiary-green: #5b7500;
$topiary-green-rgb: 91, 117, 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);
}