#B36115

CSS

:root {
  --light-brown: #b36115;
  --light-brown-rgb: 179 97 21;
  --light-brown-oklch: oklch(0.577 0.133 56.2);
}

.element {
  color: var(--light-brown);
  background-color: hsl(29 79% 39%);
  border-color: oklch(0.577 0.133 56.2);
}

Tailwind CSS v4

@theme {
  --color-light-brown: #b36115;
  --color-light-brown-50: #ffedd0;
  --color-light-brown-100: #ffdebd;
  --color-light-brown-200: #ffc79c;
  --color-light-brown-300: #eba671;
  --color-light-brown-400: #d9884a;
  --color-light-brown-500: #c66b11;
  --color-light-brown-600: #a85b14;
  --color-light-brown-700: #874810;
  --color-light-brown-800: #65340b;
  --color-light-brown-900: #472307;
  --color-light-brown-950: #2e1200;
}

SCSS

$light-brown: #b36115;
$light-brown-rgb: 179, 97, 21;
$light-brown-light: mix(#fff, $light-brown, 20%);
$light-brown-dark: mix(#000, $light-brown, 20%);

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