Examine source code of disco bulbs

{
  "theme": {
    "images": {
      "theme_frame": "discobulbs.jpg"
    },
    "colors": {
      "frame": "#c1d2eb",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "disco bulbs",
  "manifest_version": 2,
  "description": "blue disco ball ornaments"
}