#677229

CSS

:root {
  --muddy-green: #677229;
  --muddy-green-rgb: 103 114 41;
  --muddy-green-oklch: oklch(0.527 0.098 117.1);
}

.element {
  color: var(--muddy-green);
  background-color: hsl(69 47% 30%);
  border-color: oklch(0.527 0.098 117.1);
}

Tailwind CSS v4

@theme {
  --color-muddy-green: #677229;
  --color-muddy-green-50: #f2fadb;
  --color-muddy-green-100: #e4edc9;
  --color-muddy-green-200: #cfdbac;
  --color-muddy-green-300: #b1bf86;
  --color-muddy-green-400: #9aa662;
  --color-muddy-green-500: #828e3d;
  --color-muddy-green-600: #6e7935;
  --color-muddy-green-700: #58602a;
  --color-muddy-green-800: #41461c;
  --color-muddy-green-900: #2d3112;
  --color-muddy-green-950: #1a1d04;
}

SCSS

$muddy-green: #677229;
$muddy-green-rgb: 103, 114, 41;
$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);
}