#AE9778

CSS

:root {
  --cookie-crumb: #ae9778;
  --cookie-crumb-rgb: 174 151 120;
  --cookie-crumb-oklch: oklch(0.689 0.051 75);
}

.element {
  color: var(--cookie-crumb);
  background-color: hsl(34 25% 58%);
  border-color: oklch(0.689 0.051 75);
}

Tailwind CSS v4

@theme {
  --color-cookie-crumb: #ae9778;
  --color-cookie-crumb-50: #fef4e5;
  --color-cookie-crumb-100: #f2e6d5;
  --color-cookie-crumb-200: #e1d2bd;
  --color-cookie-crumb-300: #c6b59b;
  --color-cookie-crumb-400: #b19b7d;
  --color-cookie-crumb-500: #9a8260;
  --color-cookie-crumb-600: #836e52;
  --color-cookie-crumb-700: #695841;
  --color-cookie-crumb-800: #4d402f;
  --color-cookie-crumb-900: #362c20;
  --color-cookie-crumb-950: #21190f;
}

SCSS

$cookie-crumb: #ae9778;
$cookie-crumb-rgb: 174, 151, 120;
$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);
}