Examine source code of Alien Blues2

{
  "theme": {
    "images": {
      "theme_frame": "p1.jpg"
    },
    "colors": {
      "frame": "#1532ed",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "Alien Blues2",
  "manifest_version": 2,
  "description": "Smaller alien on blue and black background."
}