#5E742F

CSS

:root {
  --muddy-green: #5e742f;
  --muddy-green-rgb: 94 116 47;
  --muddy-green-oklch: oklch(0.525 0.099 124.5);
}

.element {
  color: var(--muddy-green);
  background-color: hsl(79 42% 32%);
  border-color: oklch(0.525 0.099 124.5);
}

Tailwind CSS v4

@theme {
  --color-muddy-green: #5e742f;
  --color-muddy-green-50: #eefbdd;
  --color-muddy-green-100: #dfefcb;
  --color-muddy-green-200: #c9ddaf;
  --color-muddy-green-300: #aac18a;
  --color-muddy-green-400: #92a967;
  --color-muddy-green-500: #789144;
  --color-muddy-green-600: #667b3a;
  --color-muddy-green-700: #51622e;
  --color-muddy-green-800: #3c481f;
  --color-muddy-green-900: #293214;
  --color-muddy-green-950: #171e06;
}

SCSS

$muddy-green: #5e742f;
$muddy-green-rgb: 94, 116, 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);
}