Examine source code of Bloooo

{
  "theme": {
    "images": {
      "theme_frame": "blue1.jpg"
    },
    "colors": {
      "frame": "#5682b1",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "Bloooo",
  "manifest_version": 2,
  "description": "A simple blue gradient that doesn't obscure text/bookmarks/tabs."
}