#806A16

CSS

:root {
  --muddy-brown: #806a16;
  --muddy-brown-rgb: 128 106 22;
  --muddy-brown-oklch: oklch(0.531 0.101 93.1);
}

.element {
  color: var(--muddy-brown);
  background-color: hsl(48 71% 29%);
  border-color: oklch(0.531 0.101 93.1);
}

Tailwind CSS v4

@theme {
  --color-muddy-brown: #806a16;
  --color-muddy-brown-50: #fef6d5;
  --color-muddy-brown-100: #f2e8c3;
  --color-muddy-brown-200: #e1d5a4;
  --color-muddy-brown-300: #c7b77b;
  --color-muddy-brown-400: #b39d55;
  --color-muddy-brown-500: #9d8429;
  --color-muddy-brown-600: #857025;
  --color-muddy-brown-700: #6a591e;
  --color-muddy-brown-800: #4f4113;
  --color-muddy-brown-900: #372d0c;
  --color-muddy-brown-950: #221a01;
}

SCSS

$muddy-brown: #806a16;
$muddy-brown-rgb: 128, 106, 22;
$muddy-brown-light: mix(#fff, $muddy-brown, 20%);
$muddy-brown-dark: mix(#000, $muddy-brown, 20%);

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