#87671A

CSS

:root {
  --muddy-brown: #87671a;
  --muddy-brown-rgb: 135 103 26;
  --muddy-brown-oklch: oklch(0.532 0.099 84.5);
}

.element {
  color: var(--muddy-brown);
  background-color: hsl(42 68% 32%);
  border-color: oklch(0.532 0.099 84.5);
}

Tailwind CSS v4

@theme {
  --color-muddy-brown: #87671a;
  --color-muddy-brown-50: #fff4d6;
  --color-muddy-brown-100: #f6e6c3;
  --color-muddy-brown-200: #e7d2a4;
  --color-muddy-brown-300: #ceb47c;
  --color-muddy-brown-400: #ba9a57;
  --color-muddy-brown-500: #a5802c;
  --color-muddy-brown-600: #8b6d28;
  --color-muddy-brown-700: #6f571f;
  --color-muddy-brown-800: #533f15;
  --color-muddy-brown-900: #3a2b0d;
  --color-muddy-brown-950: #241802;
}

SCSS

$muddy-brown: #87671a;
$muddy-brown-rgb: 135, 103, 26;
$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);
}