#6C7B2F

CSS

:root {
  --muddy-green: #6c7b2f;
  --muddy-green-rgb: 108 123 47;
  --muddy-green-oklch: oklch(0.554 0.103 119.3);
}

.element {
  color: var(--muddy-green);
  background-color: hsl(72 45% 33%);
  border-color: oklch(0.554 0.103 119.3);
}

Tailwind CSS v4

@theme {
  --color-muddy-green: #6c7b2f;
  --color-muddy-green-50: #f0fada;
  --color-muddy-green-100: #e2eec8;
  --color-muddy-green-200: #cddcab;
  --color-muddy-green-300: #afc085;
  --color-muddy-green-400: #97a760;
  --color-muddy-green-500: #7f903a;
  --color-muddy-green-600: #6b7933;
  --color-muddy-green-700: #566128;
  --color-muddy-green-800: #40471a;
  --color-muddy-green-900: #2c3111;
  --color-muddy-green-950: #191d04;
}

SCSS

$muddy-green: #6c7b2f;
$muddy-green-rgb: 108, 123, 47;
$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);
}