Examine source code of colorfull dawn

{
  "theme": {
    "images": {
      "theme_frame": "aube.png"
    },
    "colors": {
      "frame": "#767878",
      "tab_background_text": "#c7f5f0"
    }
  },
  "version": "2.0",
  "name": "colorfull dawn",
  "manifest_version": 2,
  "description": "dawn sunrise aube aurore colorfull couleurs mountain montagne"
}