#597528

CSS

:root {
  --muddy-green: #597528;
  --muddy-green-rgb: 89 117 40;
  --muddy-green-oklch: oklch(0.523 0.109 126.9);
}

.element {
  color: var(--muddy-green);
  background-color: hsl(82 49% 31%);
  border-color: oklch(0.523 0.109 126.9);
}

Tailwind CSS v4

@theme {
  --color-muddy-green: #597528;
  --color-muddy-green-50: #ecfcdb;
  --color-muddy-green-100: #ddf0c9;
  --color-muddy-green-200: #c6dead;
  --color-muddy-green-300: #a6c387;
  --color-muddy-green-400: #8daa62;
  --color-muddy-green-500: #73933d;
  --color-muddy-green-600: #617c35;
  --color-muddy-green-700: #4e642a;
  --color-muddy-green-800: #3a491b;
  --color-muddy-green-900: #283212;
  --color-muddy-green-950: #161e04;
}

SCSS

$muddy-green: #597528;
$muddy-green-rgb: 89, 117, 40;
$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);
}