Examine source code of DarkSky

{
  "name": "DarkSky",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "masthead_2.jpeg"
    },
    "colors": {
      "frame": "rgba(105, 105, 105, 1)",
      "tab_background_text": "rgba(255, 255, 255, 1)",
      "toolbar": "rgba(15, 15, 15, 1)",
      "bookmark_text": "rgba(138, 255, 251, 1)",
      "toolbar_field": "rgba(156, 156, 156, 1)",
      "toolbar_field_text": "rgba(0, 27, 133, 1)",
      "tab_line": "rgba(255, 255, 255, 1)"
    }
  }
}