Examine source code of Bakuman Style

{
  "theme": {
    "images": {
      "theme_frame": "bakumanheader439.jpeg"
    },
    "colors": {
      "frame": "#212020",
      "tab_background_text": "#db0d0d"
    }
  },
  "version": "2.0",
  "name": "Bakuman Style",
  "manifest_version": 2,
  "description": "Bakuman pictures in one ..."
}