#8E7159

CSS

:root {
  --whisky-barrel: #8e7159;
  --whisky-barrel-rgb: 142 113 89;
  --whisky-barrel-oklch: oklch(0.571 0.051 61.1);
}

.element {
  color: var(--whisky-barrel);
  background-color: hsl(27 23% 45%);
  border-color: oklch(0.571 0.051 61.1);
}

Tailwind CSS v4

@theme {
  --color-whisky-barrel: #8e7159;
  --color-whisky-barrel-50: #fff2e7;
  --color-whisky-barrel-100: #f5e5d7;
  --color-whisky-barrel-200: #e5d0bf;
  --color-whisky-barrel-300: #cbb29d;
  --color-whisky-barrel-400: #b59880;
  --color-whisky-barrel-500: #9f7f64;
  --color-whisky-barrel-600: #876b55;
  --color-whisky-barrel-700: #6c5644;
  --color-whisky-barrel-800: #503e31;
  --color-whisky-barrel-900: #382b21;
  --color-whisky-barrel-950: #221810;
}

SCSS

$whisky-barrel: #8e7159;
$whisky-barrel-rgb: 142, 113, 89;
$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);
}