Examine source code of Machined Bars

{
  "theme": {
    "images": {
      "theme_frame": "machined-bars-header.jpg"
    },
    "colors": {
      "frame": "#d9a5a5",
      "tab_background_text": "#030303"
    }
  },
  "version": "2.0",
  "name": "Machined Bars",
  "manifest_version": 2,
  "description": "Another design done with Illustrator"
}