#7E6B00

CSS

:root {
  --muddy-brown: #7e6b00;
  --muddy-brown-rgb: 126 107 0;
  --muddy-brown-oklch: oklch(0.53 0.109 96.8);
}

.element {
  color: var(--muddy-brown);
  background-color: hsl(51 100% 25%);
  border-color: oklch(0.53 0.109 96.8);
}

Tailwind CSS v4

@theme {
  --color-muddy-brown: #7e6b00;
  --color-muddy-brown-50: #fdf6d3;
  --color-muddy-brown-100: #f1e9c0;
  --color-muddy-brown-200: #e0d6a0;
  --color-muddy-brown-300: #c5b976;
  --color-muddy-brown-400: #b19e4e;
  --color-muddy-brown-500: #9b851a;
  --color-muddy-brown-600: #83711a;
  --color-muddy-brown-700: #695a15;
  --color-muddy-brown-800: #4e410c;
  --color-muddy-brown-900: #362d07;
  --color-muddy-brown-950: #211a00;
}

SCSS

$muddy-brown: #7e6b00;
$muddy-brown-rgb: 126, 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);
}