#7B6C04

CSS

:root {
  --muddy-brown: #7b6c04;
  --muddy-brown-rgb: 123 108 4;
  --muddy-brown-oklch: oklch(0.529 0.109 99.5);
}

.element {
  color: var(--muddy-brown);
  background-color: hsl(52 94% 25%);
  border-color: oklch(0.529 0.109 99.5);
}

Tailwind CSS v4

@theme {
  --color-muddy-brown: #7b6c04;
  --color-muddy-brown-50: #fbf7d4;
  --color-muddy-brown-100: #efeac0;
  --color-muddy-brown-200: #ddd6a1;
  --color-muddy-brown-300: #c3ba77;
  --color-muddy-brown-400: #aea04f;
  --color-muddy-brown-500: #98871d;
  --color-muddy-brown-600: #80721c;
  --color-muddy-brown-700: #675b17;
  --color-muddy-brown-800: #4d420d;
  --color-muddy-brown-900: #352e08;
  --color-muddy-brown-950: #211a00;
}

SCSS

$muddy-brown: #7b6c04;
$muddy-brown-rgb: 123, 108, 4;
$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);
}