#7B7551

CSS

:root {
  --greek-oregano: #7b7551;
  --greek-oregano-rgb: 123 117 81;
  --greek-oregano-oklch: oklch(0.558 0.052 99.8);
}

.element {
  color: var(--greek-oregano);
  background-color: hsl(51 21% 40%);
  border-color: oklch(0.558 0.052 99.8);
}

Tailwind CSS v4

@theme {
  --color-greek-oregano: #7b7551;
  --color-greek-oregano-50: #f8f6e5;
  --color-greek-oregano-100: #ebe9d5;
  --color-greek-oregano-200: #d8d5bc;
  --color-greek-oregano-300: #bcb99a;
  --color-greek-oregano-400: #a5a07c;
  --color-greek-oregano-500: #8e875f;
  --color-greek-oregano-600: #787351;
  --color-greek-oregano-700: #605c40;
  --color-greek-oregano-800: #47432e;
  --color-greek-oregano-900: #312e1f;
  --color-greek-oregano-950: #1d1b0f;
}

SCSS

$greek-oregano: #7b7551;
$greek-oregano-rgb: 123, 117, 81;
$greek-oregano-light: mix(#fff, $greek-oregano, 20%);
$greek-oregano-dark: mix(#000, $greek-oregano, 20%);

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