#90705A

CSS

:root {
  --whisky-barrel: #90705a;
  --whisky-barrel-rgb: 144 112 90;
  --whisky-barrel-oklch: oklch(0.571 0.052 56);
}

.element {
  color: var(--whisky-barrel);
  background-color: hsl(24 23% 46%);
  border-color: oklch(0.571 0.052 56);
}

Tailwind CSS v4

@theme {
  --color-whisky-barrel: #90705a;
  --color-whisky-barrel-50: #fff2e7;
  --color-whisky-barrel-100: #f6e4d7;
  --color-whisky-barrel-200: #e6cfbf;
  --color-whisky-barrel-300: #cdb19e;
  --color-whisky-barrel-400: #b79781;
  --color-whisky-barrel-500: #a27e65;
  --color-whisky-barrel-600: #896a56;
  --color-whisky-barrel-700: #6d5544;
  --color-whisky-barrel-800: #513e31;
  --color-whisky-barrel-900: #382a22;
  --color-whisky-barrel-950: #231811;
}

SCSS

$whisky-barrel: #90705a;
$whisky-barrel-rgb: 144, 112, 90;
$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);
}