#B39676

CSS

:root {
  --cookie-crumb: #b39676;
  --cookie-crumb-rgb: 179 150 118;
  --cookie-crumb-oklch: oklch(0.691 0.056 69.4);
}

.element {
  color: var(--cookie-crumb);
  background-color: hsl(31 29% 58%);
  border-color: oklch(0.691 0.056 69.4);
}

Tailwind CSS v4

@theme {
  --color-cookie-crumb: #b39676;
  --color-cookie-crumb-50: #fff3e4;
  --color-cookie-crumb-100: #f4e5d4;
  --color-cookie-crumb-200: #e4d1bb;
  --color-cookie-crumb-300: #cab398;
  --color-cookie-crumb-400: #b5997b;
  --color-cookie-crumb-500: #9f805d;
  --color-cookie-crumb-600: #866c4f;
  --color-cookie-crumb-700: #6c563f;
  --color-cookie-crumb-800: #503f2d;
  --color-cookie-crumb-900: #372b1e;
  --color-cookie-crumb-950: #22180e;
}

SCSS

$cookie-crumb: #b39676;
$cookie-crumb-rgb: 179, 150, 118;
$cookie-crumb-light: mix(#fff, $cookie-crumb, 20%);
$cookie-crumb-dark: mix(#000, $cookie-crumb, 20%);

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