Examine source code of Floating Squares

{
  "theme": {
    "images": {
      "theme_frame": "Squares.jpg"
    },
    "colors": {
      "frame": "#0eaab8",
      "tab_background_text": "#77f0f2"
    }
  },
  "version": "2.0",
  "name": "Floating Squares",
  "manifest_version": 2,
  "description": "Multi color squares floating on a soft brown background."
}