#67722D

CSS

:root {
  --muddy-green: #67722d;
  --muddy-green-rgb: 103 114 45;
  --muddy-green-oklch: oklch(0.527 0.094 117.3);
}

.element {
  color: var(--muddy-green);
  background-color: hsl(70 43% 31%);
  border-color: oklch(0.527 0.094 117.3);
}

Tailwind CSS v4

@theme {
  --color-muddy-green: #67722d;
  --color-muddy-green-50: #f2fadc;
  --color-muddy-green-100: #e4edca;
  --color-muddy-green-200: #cfdbae;
  --color-muddy-green-300: #b1bf88;
  --color-muddy-green-400: #9aa665;
  --color-muddy-green-500: #818e41;
  --color-muddy-green-600: #6e7838;
  --color-muddy-green-700: #58602c;
  --color-muddy-green-800: #41461e;
  --color-muddy-green-900: #2d3113;
  --color-muddy-green-950: #1a1d05;
}

SCSS

$muddy-green: #67722d;
$muddy-green-rgb: 103, 114, 45;
$muddy-green-light: mix(#fff, $muddy-green, 20%);
$muddy-green-dark: mix(#000, $muddy-green, 20%);

.element {
  color: $muddy-green;
  box-shadow: 0 0 0 2px rgba($muddy-green, 0.35);
}