#445A47

CSS

:root {
  --muddy-olive: #445a47;
  --muddy-olive-rgb: 68 90 71;
  --muddy-olive-oklch: oklch(0.444 0.041 148.6);
}

.element {
  color: var(--muddy-olive);
  background-color: hsl(128 14% 31%);
  border-color: oklch(0.444 0.041 148.6);
}

Tailwind CSS v4

@theme {
  --color-muddy-olive: #445a47;
  --color-muddy-olive-50: #edf9ef;
  --color-muddy-olive-100: #dfece1;
  --color-muddy-olive-200: #c8dacb;
  --color-muddy-olive-300: #a9bead;
  --color-muddy-olive-400: #8fa691;
  --color-muddy-olive-500: #748e77;
  --color-muddy-olive-600: #627865;
  --color-muddy-olive-700: #4f6051;
  --color-muddy-olive-800: #39463a;
  --color-muddy-olive-900: #273128;
  --color-muddy-olive-950: #151d16;
}

SCSS

$muddy-olive: #445a47;
$muddy-olive-rgb: 68, 90, 71;
$muddy-olive-light: mix(#fff, $muddy-olive, 20%);
$muddy-olive-dark: mix(#000, $muddy-olive, 20%);

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