#7D6B00

CSS

:root {
  --muddy-brown: #7d6b00;
  --muddy-brown-rgb: 125 107 0;
  --muddy-brown-oklch: oklch(0.529 0.109 97.5);
}

.element {
  color: var(--muddy-brown);
  background-color: hsl(51 100% 25%);
  border-color: oklch(0.529 0.109 97.5);
}

Tailwind CSS v4

@theme {
  --color-muddy-brown: #7d6b00;
  --color-muddy-brown-50: #fcf6d3;
  --color-muddy-brown-100: #f0e9c0;
  --color-muddy-brown-200: #dfd6a0;
  --color-muddy-brown-300: #c5b977;
  --color-muddy-brown-400: #b09f4e;
  --color-muddy-brown-500: #9a861a;
  --color-muddy-brown-600: #82711a;
  --color-muddy-brown-700: #685b15;
  --color-muddy-brown-800: #4e420c;
  --color-muddy-brown-900: #362d08;
  --color-muddy-brown-950: #211a00;
}

SCSS

$muddy-brown: #7d6b00;
$muddy-brown-rgb: 125, 107, 0;
$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);
}