#826A13

CSS

:root {
  --muddy-brown: #826a13;
  --muddy-brown-rgb: 130 106 19;
  --muddy-brown-oklch: oklch(0.533 0.103 92);
}

.element {
  color: var(--muddy-brown);
  background-color: hsl(47 74% 29%);
  border-color: oklch(0.533 0.103 92);
}

Tailwind CSS v4

@theme {
  --color-muddy-brown: #826a13;
  --color-muddy-brown-50: #fff5d5;
  --color-muddy-brown-100: #f3e8c2;
  --color-muddy-brown-200: #e2d4a3;
  --color-muddy-brown-300: #c8b77a;
  --color-muddy-brown-400: #b49d53;
  --color-muddy-brown-500: #9f8326;
  --color-muddy-brown-600: #866f23;
  --color-muddy-brown-700: #6b591c;
  --color-muddy-brown-800: #504011;
  --color-muddy-brown-900: #382c0b;
  --color-muddy-brown-950: #221901;
}

SCSS

$muddy-brown: #826a13;
$muddy-brown-rgb: 130, 106, 19;
$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);
}