#BC8B63

CSS

:root {
  --deer: #bc8b63;
  --deer-rgb: 188 139 99;
  --deer-oklch: oklch(0.675 0.081 60);
}

.element {
  color: var(--deer);
  background-color: hsl(27 40% 56%);
  border-color: oklch(0.675 0.081 60);
}

Tailwind CSS v4

@theme {
  --color-deer: #bc8b63;
  --color-deer-50: #fff1de;
  --color-deer-100: #fde3cd;
  --color-deer-200: #eecdb1;
  --color-deer-300: #d6af8d;
  --color-deer-400: #c2936d;
  --color-deer-500: #ae794d;
  --color-deer-600: #936742;
  --color-deer-700: #765234;
  --color-deer-800: #583b25;
  --color-deer-900: #3d2919;
  --color-deer-950: #27160a;
}

SCSS

$deer: #bc8b63;
$deer-rgb: 188, 139, 99;
$deer-light: mix(#fff, $deer, 20%);
$deer-dark: mix(#000, $deer, 20%);

.element {
  color: $deer;
  box-shadow: 0 0 0 2px rgba($deer, 0.35);
}