Examine source code of Life Yellow Blue

{
  "theme": {
    "images": {
      "theme_frame": "header1.png"
    },
    "colors": {
      "frame": "#ffcc33",
      "tab_background_text": "#00319c"
    }
  },
  "version": "2.0",
  "name": "Life Yellow Blue",
  "manifest_version": 2,
  "description": "Life in yellow and blue"
}