#B29679

CSS

:root {
  --cookie-crumb: #b29679;
  --cookie-crumb-rgb: 178 150 121;
  --cookie-crumb-oklch: oklch(0.691 0.053 67.8);
}

.element {
  color: var(--cookie-crumb);
  background-color: hsl(31 27% 59%);
  border-color: oklch(0.691 0.053 67.8);
}

Tailwind CSS v4

@theme {
  --color-cookie-crumb: #b29679;
  --color-cookie-crumb-50: #fff3e5;
  --color-cookie-crumb-100: #f4e5d6;
  --color-cookie-crumb-200: #e3d1bd;
  --color-cookie-crumb-300: #c9b39b;
  --color-cookie-crumb-400: #b4997e;
  --color-cookie-crumb-500: #9e8060;
  --color-cookie-crumb-600: #856c52;
  --color-cookie-crumb-700: #6b5741;
  --color-cookie-crumb-800: #4f3f2f;
  --color-cookie-crumb-900: #372b20;
  --color-cookie-crumb-950: #22190f;
}

SCSS

$cookie-crumb: #b29679;
$cookie-crumb-rgb: 178, 150, 121;
$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);
}