#7D7545

CSS

:root {
  --greek-oregano: #7d7545;
  --greek-oregano-rgb: 125 117 69;
  --greek-oregano-oklch: oklch(0.558 0.068 100);
}

.element {
  color: var(--greek-oregano);
  background-color: hsl(51 29% 38%);
  border-color: oklch(0.558 0.068 100);
}

Tailwind CSS v4

@theme {
  --color-greek-oregano: #7d7545;
  --color-greek-oregano-50: #f9f6e0;
  --color-greek-oregano-100: #ece9d0;
  --color-greek-oregano-200: #dad6b5;
  --color-greek-oregano-300: #beb991;
  --color-greek-oregano-400: #a7a071;
  --color-greek-oregano-500: #908751;
  --color-greek-oregano-600: #7a7345;
  --color-greek-oregano-700: #625c37;
  --color-greek-oregano-800: #484327;
  --color-greek-oregano-900: #322e1a;
  --color-greek-oregano-950: #1e1b0a;
}

SCSS

$greek-oregano: #7d7545;
$greek-oregano-rgb: 125, 117, 69;
$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);
}