#525E44

CSS

:root {
  --heavy-green: #525e44;
  --heavy-green-rgb: 82 94 68;
  --heavy-green-oklch: oklch(0.464 0.043 128.1);
}

.element {
  color: var(--heavy-green);
  background-color: hsl(88 16% 32%);
  border-color: oklch(0.464 0.043 128.1);
}

Tailwind CSS v4

@theme {
  --color-heavy-green: #525e44;
  --color-heavy-green-50: #f1f8eb;
  --color-heavy-green-100: #e3ebdc;
  --color-heavy-green-200: #ced8c5;
  --color-heavy-green-300: #b0bca5;
  --color-heavy-green-400: #97a489;
  --color-heavy-green-500: #7e8c6d;
  --color-heavy-green-600: #6a765d;
  --color-heavy-green-700: #555f4a;
  --color-heavy-green-800: #3e4535;
  --color-heavy-green-900: #2b3024;
  --color-heavy-green-950: #181c13;
}

SCSS

$heavy-green: #525e44;
$heavy-green-rgb: 82, 94, 68;
$heavy-green-light: mix(#fff, $heavy-green, 20%);
$heavy-green-dark: mix(#000, $heavy-green, 20%);

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