Examine source code of Brushed Steel

{
  "theme": {
    "images": {
      "theme_frame": "BrushedHeader.jpg"
    },
    "colors": {
      "frame": "#b3b3b3",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "Brushed Steel",
  "manifest_version": 2,
  "description": "Just a quick brushed metal effect."
}