#826919

CSS

:root {
  --muddy-brown: #826919;
  --muddy-brown-rgb: 130 105 25;
  --muddy-brown-oklch: oklch(0.531 0.099 90.4);
}

.element {
  color: var(--muddy-brown);
  background-color: hsl(46 68% 30%);
  border-color: oklch(0.531 0.099 90.4);
}

Tailwind CSS v4

@theme {
  --color-muddy-brown: #826919;
  --color-muddy-brown-50: #fff5d6;
  --color-muddy-brown-100: #f3e8c3;
  --color-muddy-brown-200: #e3d4a4;
  --color-muddy-brown-300: #c9b67c;
  --color-muddy-brown-400: #b59c57;
  --color-muddy-brown-500: #9f832c;
  --color-muddy-brown-600: #876f27;
  --color-muddy-brown-700: #6c591f;
  --color-muddy-brown-800: #504014;
  --color-muddy-brown-900: #382c0d;
  --color-muddy-brown-950: #231902;
}

SCSS

$muddy-brown: #826919;
$muddy-brown-rgb: 130, 105, 25;
$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);
}