#AF6423

CSS

:root {
  --light-brown: #af6423;
  --light-brown-rgb: 175 100 35;
  --light-brown-oklch: oklch(0.578 0.123 56.9);
}

.element {
  color: var(--light-brown);
  background-color: hsl(28 67% 41%);
  border-color: oklch(0.578 0.123 56.9);
}

Tailwind CSS v4

@theme {
  --color-light-brown: #af6423;
  --color-light-brown-50: #ffedd3;
  --color-light-brown-100: #ffdfc0;
  --color-light-brown-200: #fdc8a0;
  --color-light-brown-300: #e7a877;
  --color-light-brown-400: #d58b51;
  --color-light-brown-500: #c26e23;
  --color-light-brown-600: #a45d20;
  --color-light-brown-700: #834a1a;
  --color-light-brown-800: #623512;
  --color-light-brown-900: #45240b;
  --color-light-brown-950: #2c1301;
}

SCSS

$light-brown: #af6423;
$light-brown-rgb: 175, 100, 35;
$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);
}