#966E51

CSS

:root {
  --whisky-barrel: #966e51;
  --whisky-barrel-rgb: 150 110 81;
  --whisky-barrel-oklch: oklch(0.572 0.066 56.9);
}

.element {
  color: var(--whisky-barrel);
  background-color: hsl(25 30% 45%);
  border-color: oklch(0.572 0.066 56.9);
}

Tailwind CSS v4

@theme {
  --color-whisky-barrel: #966e51;
  --color-whisky-barrel-50: #fff1e3;
  --color-whisky-barrel-100: #f9e3d3;
  --color-whisky-barrel-200: #eaceb9;
  --color-whisky-barrel-300: #d2b096;
  --color-whisky-barrel-400: #bd9578;
  --color-whisky-barrel-500: #a87b5b;
  --color-whisky-barrel-600: #8e684d;
  --color-whisky-barrel-700: #72533d;
  --color-whisky-barrel-800: #543c2c;
  --color-whisky-barrel-900: #3b291e;
  --color-whisky-barrel-950: #25170e;
}

SCSS

$whisky-barrel: #966e51;
$whisky-barrel-rgb: 150, 110, 81;
$whisky-barrel-light: mix(#fff, $whisky-barrel, 20%);
$whisky-barrel-dark: mix(#000, $whisky-barrel, 20%);

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