#6C7E2F

CSS

:root {
  --muddy-green: #6c7e2f;
  --muddy-green-rgb: 108 126 47;
  --muddy-green-oklch: oklch(0.561 0.107 120.8);
}

.element {
  color: var(--muddy-green);
  background-color: hsl(74 46% 34%);
  border-color: oklch(0.561 0.107 120.8);
}

Tailwind CSS v4

@theme {
  --color-muddy-green: #6c7e2f;
  --color-muddy-green-50: #effbd9;
  --color-muddy-green-100: #e1eec7;
  --color-muddy-green-200: #ccdcaa;
  --color-muddy-green-300: #adc183;
  --color-muddy-green-400: #95a85e;
  --color-muddy-green-500: #7c9038;
  --color-muddy-green-600: #697a30;
  --color-muddy-green-700: #546226;
  --color-muddy-green-800: #3f4719;
  --color-muddy-green-900: #2b3110;
  --color-muddy-green-950: #181d03;
}

SCSS

$muddy-green: #6c7e2f;
$muddy-green-rgb: 108, 126, 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);
}