#8E7156

CSS

:root {
  --whisky-barrel: #8e7156;
  --whisky-barrel-rgb: 142 113 86;
  --whisky-barrel-oklch: oklch(0.57 0.054 64.4);
}

.element {
  color: var(--whisky-barrel);
  background-color: hsl(29 25% 45%);
  border-color: oklch(0.57 0.054 64.4);
}

Tailwind CSS v4

@theme {
  --color-whisky-barrel: #8e7156;
  --color-whisky-barrel-50: #fff3e5;
  --color-whisky-barrel-100: #f5e5d6;
  --color-whisky-barrel-200: #e5d0bd;
  --color-whisky-barrel-300: #cbb39b;
  --color-whisky-barrel-400: #b5987e;
  --color-whisky-barrel-500: #a07f61;
  --color-whisky-barrel-600: #876c52;
  --color-whisky-barrel-700: #6c5641;
  --color-whisky-barrel-800: #503e2f;
  --color-whisky-barrel-900: #382b20;
  --color-whisky-barrel-950: #22180f;
}

SCSS

$whisky-barrel: #8e7156;
$whisky-barrel-rgb: 142, 113, 86;
$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);
}