#B06320

CSS

:root {
  --light-brown: #b06320;
  --light-brown-rgb: 176 99 32;
  --light-brown-oklch: oklch(0.577 0.126 56.5);
}

.element {
  color: var(--light-brown);
  background-color: hsl(28 69% 41%);
  border-color: oklch(0.577 0.126 56.5);
}

Tailwind CSS v4

@theme {
  --color-light-brown: #b06320;
  --color-light-brown-50: #ffedd2;
  --color-light-brown-100: #ffdebf;
  --color-light-brown-200: #fec89f;
  --color-light-brown-300: #e8a775;
  --color-light-brown-400: #d68a50;
  --color-light-brown-500: #c36d20;
  --color-light-brown-600: #a55d1e;
  --color-light-brown-700: #844a18;
  --color-light-brown-800: #633511;
  --color-light-brown-900: #45240a;
  --color-light-brown-950: #2d1201;
}

SCSS

$light-brown: #b06320;
$light-brown-rgb: 176, 99, 32;
$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);
}