#976E51

CSS

:root {
  --whisky-barrel: #976e51;
  --whisky-barrel-rgb: 151 110 81;
  --whisky-barrel-oklch: oklch(0.573 0.067 56.2);
}

.element {
  color: var(--whisky-barrel);
  background-color: hsl(25 30% 45%);
  border-color: oklch(0.573 0.067 56.2);
}

Tailwind CSS v4

@theme {
  --color-whisky-barrel: #976e51;
  --color-whisky-barrel-50: #fff1e3;
  --color-whisky-barrel-100: #fae3d2;
  --color-whisky-barrel-200: #ebceb9;
  --color-whisky-barrel-300: #d2b096;
  --color-whisky-barrel-400: #be9578;
  --color-whisky-barrel-500: #a97b5a;
  --color-whisky-barrel-600: #8f684d;
  --color-whisky-barrel-700: #72533d;
  --color-whisky-barrel-800: #553c2c;
  --color-whisky-barrel-900: #3b291e;
  --color-whisky-barrel-950: #25170e;
}

SCSS

$whisky-barrel: #976e51;
$whisky-barrel-rgb: 151, 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);
}