#B59575

CSS

:root {
  --cookie-crumb: #b59575;
  --cookie-crumb-rgb: 181 149 117;
  --cookie-crumb-oklch: oklch(0.691 0.059 66.6);
}

.element {
  color: var(--cookie-crumb);
  background-color: hsl(30 30% 58%);
  border-color: oklch(0.691 0.059 66.6);
}

Tailwind CSS v4

@theme {
  --color-cookie-crumb: #b59575;
  --color-cookie-crumb-50: #fff3e4;
  --color-cookie-crumb-100: #f5e5d4;
  --color-cookie-crumb-200: #e5d0ba;
  --color-cookie-crumb-300: #ccb298;
  --color-cookie-crumb-400: #b7987a;
  --color-cookie-crumb-500: #a17f5c;
  --color-cookie-crumb-600: #886b4e;
  --color-cookie-crumb-700: #6d563e;
  --color-cookie-crumb-800: #513e2d;
  --color-cookie-crumb-900: #382b1e;
  --color-cookie-crumb-950: #23180e;
}

SCSS

$cookie-crumb: #b59575;
$cookie-crumb-rgb: 181, 149, 117;
$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);
}