#885A4B

CSS

:root {
  --root-beer: #885a4b;
  --root-beer-rgb: 136 90 75;
  --root-beer-oklch: oklch(0.514 0.066 38.8);
}

.element {
  color: var(--root-beer);
  background-color: hsl(15 29% 41%);
  border-color: oklch(0.514 0.066 38.8);
}

Tailwind CSS v4

@theme {
  --color-root-beer: #885a4b;
  --color-root-beer-50: #ffefe7;
  --color-root-beer-100: #fce1d8;
  --color-root-beer-200: #eeccbf;
  --color-root-beer-300: #d6ad9e;
  --color-root-beer-400: #c19282;
  --color-root-beer-500: #ac7766;
  --color-root-beer-600: #926557;
  --color-root-beer-700: #755145;
  --color-root-beer-800: #573a32;
  --color-root-beer-900: #3c2822;
  --color-root-beer-950: #261611;
}

SCSS

$root-beer: #885a4b;
$root-beer-rgb: 136, 90, 75;
$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);
}