#B66006

CSS

:root {
  --light-brown: #b66006;
  --light-brown-rgb: 182 96 6;
  --light-brown-oklch: oklch(0.579 0.139 56.3);
}

.element {
  color: var(--light-brown);
  background-color: hsl(31 94% 37%);
  border-color: oklch(0.579 0.139 56.3);
}

Tailwind CSS v4

@theme {
  --color-light-brown: #b66006;
  --color-light-brown-50: #ffecce;
  --color-light-brown-100: #ffddba;
  --color-light-brown-200: #ffc699;
  --color-light-brown-300: #eda56d;
  --color-light-brown-400: #dc8744;
  --color-light-brown-500: #c96900;
  --color-light-brown-600: #aa5905;
  --color-light-brown-700: #884707;
  --color-light-brown-800: #663306;
  --color-light-brown-900: #482204;
  --color-light-brown-950: #2f1100;
}

SCSS

$light-brown: #b66006;
$light-brown-rgb: 182, 96, 6;
$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);
}