Examine source code of Desk Theme

{
  "theme": {
    "images": {
      "theme_frame": "Header.jpg"
    },
    "colors": {
      "frame": "#0000cc",
      "tab_background_text": "#ffcc00"
    }
  },
  "version": "2.0",
  "name": "Desk Theme",
  "manifest_version": 2,
  "description": "Gives the feeling of a desk (inspired by Deskter and Google Mail's Desk theme)."
}