#AD9B42

CSS

:root {
  --formosan-green: #ad9b42;
  --formosan-green-rgb: 173 155 66;
  --formosan-green-oklch: oklch(0.688 0.111 97.9);
}

.element {
  color: var(--formosan-green);
  background-color: hsl(50 45% 47%);
  border-color: oklch(0.688 0.111 97.9);
}

Tailwind CSS v4

@theme {
  --color-formosan-green: #ad9b42;
  --color-formosan-green-50: #fcf7d2;
  --color-formosan-green-100: #f0e9bf;
  --color-formosan-green-200: #dfd69f;
  --color-formosan-green-300: #c4b975;
  --color-formosan-green-400: #b09f4c;
  --color-formosan-green-500: #9a8616;
  --color-formosan-green-600: #827117;
  --color-formosan-green-700: #685b13;
  --color-formosan-green-800: #4e420a;
  --color-formosan-green-900: #362d07;
  --color-formosan-green-950: #211a00;
}

SCSS

$formosan-green: #ad9b42;
$formosan-green-rgb: 173, 155, 66;
$formosan-green-light: mix(#fff, $formosan-green, 20%);
$formosan-green-dark: mix(#000, $formosan-green, 20%);

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