Examine source code of Aluminum

{
  "theme": {
    "images": {
      "theme_frame": "Aluminum-Header.jpg"
    },
    "colors": {
      "frame": "#c9c9c9",
      "tab_background_text": "#000000"
    }
  },
  "version": "2.0",
  "name": "Aluminum",
  "manifest_version": 2,
  "description": "Minimalist, aluminum like theme. This is my first persona putting up. Haven't tested it in any resolution other than 1920x1200 so I don't know how it would look in other sizes. "
}