#8A544A

CSS

:root {
  --root-beer: #8a544a;
  --root-beer-rgb: 138 84 74;
  --root-beer-oklch: oklch(0.505 0.074 31.2);
}

.element {
  color: var(--root-beer);
  background-color: hsl(9 30% 42%);
  border-color: oklch(0.505 0.074 31.2);
}

Tailwind CSS v4

@theme {
  --color-root-beer: #8a544a;
  --color-root-beer-50: #ffeee8;
  --color-root-beer-100: #ffe0d8;
  --color-root-beer-200: #f2c9c0;
  --color-root-beer-300: #dbaa9f;
  --color-root-beer-400: #c78e84;
  --color-root-beer-500: #b27368;
  --color-root-beer-600: #966258;
  --color-root-beer-700: #794e46;
  --color-root-beer-800: #593833;
  --color-root-beer-900: #3f2723;
  --color-root-beer-950: #281512;
}

SCSS

$root-beer: #8a544a;
$root-beer-rgb: 138, 84, 74;
$root-beer-light: mix(#fff, $root-beer, 20%);
$root-beer-dark: mix(#000, $root-beer, 20%);

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