Examine source code of Doodle in Class

{
  "theme": {
    "images": {
      "theme_frame": "Doodle.jpg"
    },
    "colors": {
      "frame": "#f58b11",
      "tab_background_text": "#3ee319"
    }
  },
  "version": "2.0",
  "name": "Doodle in Class",
  "manifest_version": 2,
  "description": "Something kind of fun I whipped up... and exactly what I'd be doing if I were bored in class."
}