#B79474

CSS

:root {
  --cookie-crumb: #b79474;
  --cookie-crumb-rgb: 183 148 116;
  --cookie-crumb-oklch: oklch(0.691 0.061 64);
}

.element {
  color: var(--cookie-crumb);
  background-color: hsl(29 32% 59%);
  border-color: oklch(0.691 0.061 64);
}

Tailwind CSS v4

@theme {
  --color-cookie-crumb: #b79474;
  --color-cookie-crumb-50: #fff2e3;
  --color-cookie-crumb-100: #f7e4d3;
  --color-cookie-crumb-200: #e7d0b9;
  --color-cookie-crumb-300: #ceb297;
  --color-cookie-crumb-400: #b99779;
  --color-cookie-crumb-500: #a37e5b;
  --color-cookie-crumb-600: #8a6b4d;
  --color-cookie-crumb-700: #6f553e;
  --color-cookie-crumb-800: #523e2c;
  --color-cookie-crumb-900: #392a1e;
  --color-cookie-crumb-950: #23180e;
}

SCSS

$cookie-crumb: #b79474;
$cookie-crumb-rgb: 183, 148, 116;
$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);
}