#6B7D3A

CSS

:root {
  --muddy-green: #6b7d3a;
  --muddy-green-rgb: 107 125 58;
  --muddy-green-oklch: oklch(0.559 0.095 122);
}

.element {
  color: var(--muddy-green);
  background-color: hsl(76 37% 36%);
  border-color: oklch(0.559 0.095 122);
}

Tailwind CSS v4

@theme {
  --color-muddy-green: #6b7d3a;
  --color-muddy-green-50: #effadd;
  --color-muddy-green-100: #e1eecb;
  --color-muddy-green-200: #ccdcaf;
  --color-muddy-green-300: #adc08a;
  --color-muddy-green-400: #95a867;
  --color-muddy-green-500: #7c9045;
  --color-muddy-green-600: #697a3b;
  --color-muddy-green-700: #54622f;
  --color-muddy-green-800: #3e471f;
  --color-muddy-green-900: #2b3115;
  --color-muddy-green-950: #181d06;
}

SCSS

$muddy-green: #6b7d3a;
$muddy-green-rgb: 107, 125, 58;
$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);
}