#B09773

CSS

:root {
  --cookie-crumb: #b09773;
  --cookie-crumb-rgb: 176 151 115;
  --cookie-crumb-oklch: oklch(0.69 0.058 76.6);
}

.element {
  color: var(--cookie-crumb);
  background-color: hsl(35 28% 57%);
  border-color: oklch(0.69 0.058 76.6);
}

Tailwind CSS v4

@theme {
  --color-cookie-crumb: #b09773;
  --color-cookie-crumb-50: #fef4e3;
  --color-cookie-crumb-100: #f3e6d3;
  --color-cookie-crumb-200: #e2d2b9;
  --color-cookie-crumb-300: #c8b497;
  --color-cookie-crumb-400: #b29a78;
  --color-cookie-crumb-500: #9c815a;
  --color-cookie-crumb-600: #846e4d;
  --color-cookie-crumb-700: #6a583d;
  --color-cookie-crumb-800: #4e402c;
  --color-cookie-crumb-900: #372c1d;
  --color-cookie-crumb-950: #21190d;
}

SCSS

$cookie-crumb: #b09773;
$cookie-crumb-rgb: 176, 151, 115;
$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);
}