Examine source code of Dark Purple

{
  "name": "Dark Purple",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "istockphoto-1423098321-612x612.jpg"
    },
    "colors": {
      "frame": "rgba(229, 230, 232, 1)",
      "tab_background_text": "rgba(156, 65, 153, 1)",
      "toolbar": "rgba(133, 101, 184, 1)",
      "bookmark_text": "rgba(221, 0, 255, 1)",
      "toolbar_field": "rgba(55, 43, 61, 1)",
      "toolbar_field_text": "rgba(68, 0, 255, 1)",
      "tab_line": "rgba(255, 0, 34, 0)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{0b363290-4cdb-480e-be25-546849dfbcdd}"
    }
  }
}