#B69475

CSS

:root {
  --cookie-crumb: #b69475;
  --cookie-crumb-rgb: 182 148 117;
  --cookie-crumb-oklch: oklch(0.69 0.059 63.9);
}

.element {
  color: var(--cookie-crumb);
  background-color: hsl(29 31% 59%);
  border-color: oklch(0.69 0.059 63.9);
}

Tailwind CSS v4

@theme {
  --color-cookie-crumb: #b69475;
  --color-cookie-crumb-50: #fff2e4;
  --color-cookie-crumb-100: #f6e4d4;
  --color-cookie-crumb-200: #e6d0ba;
  --color-cookie-crumb-300: #cdb298;
  --color-cookie-crumb-400: #b8977a;
  --color-cookie-crumb-500: #a27e5c;
  --color-cookie-crumb-600: #896b4f;
  --color-cookie-crumb-700: #6e553f;
  --color-cookie-crumb-800: #523e2d;
  --color-cookie-crumb-900: #392b1e;
  --color-cookie-crumb-950: #23180e;
}

SCSS

$cookie-crumb: #b69475;
$cookie-crumb-rgb: 182, 148, 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);
}