Examine source code of Blue Gradient 34

{
  "theme": {
    "images": {
      "theme_frame": "H-2-3-13b.jpg"
    },
    "colors": {
      "frame": "#000000",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "Blue Gradient 34",
  "manifest_version": 2,
  "description": "blue"
}