#A79C45

CSS

:root {
  --formosan-green: #a79c45;
  --formosan-green-rgb: 167 156 69;
  --formosan-green-oklch: oklch(0.684 0.109 102.2);
}

.element {
  color: var(--formosan-green);
  background-color: hsl(53 42% 46%);
  border-color: oklch(0.684 0.109 102.2);
}

Tailwind CSS v4

@theme {
  --color-formosan-green: #a79c45;
  --color-formosan-green-50: #faf7d4;
  --color-formosan-green-100: #edeac1;
  --color-formosan-green-200: #dbd7a1;
  --color-formosan-green-300: #c0bb78;
  --color-formosan-green-400: #aba150;
  --color-formosan-green-500: #95881e;
  --color-formosan-green-600: #7e731d;
  --color-formosan-green-700: #655c17;
  --color-formosan-green-800: #4b430d;
  --color-formosan-green-900: #342e08;
  --color-formosan-green-950: #201b00;
}

SCSS

$formosan-green: #a79c45;
$formosan-green-rgb: 167, 156, 69;
$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);
}