#B1630F

CSS

:root {
  --light-brown: #b1630f;
  --light-brown-rgb: 177 99 15;
  --light-brown-oklch: oklch(0.577 0.132 59.2);
}

.element {
  color: var(--light-brown);
  background-color: hsl(31 84% 38%);
  border-color: oklch(0.577 0.132 59.2);
}

Tailwind CSS v4

@theme {
  --color-light-brown: #b1630f;
  --color-light-brown-50: #ffedd0;
  --color-light-brown-100: #ffdfbc;
  --color-light-brown-200: #fec89b;
  --color-light-brown-300: #e8a870;
  --color-light-brown-400: #d78a47;
  --color-light-brown-500: #c46d06;
  --color-light-brown-600: #a65c0e;
  --color-light-brown-700: #854a0c;
  --color-light-brown-800: #633509;
  --color-light-brown-900: #462406;
  --color-light-brown-950: #2d1200;
}

SCSS

$light-brown: #b1630f;
$light-brown-rgb: 177, 99, 15;
$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);
}