Examine source code of Inverse Aquarium

{
  "theme": {
    "images": {
      "theme_frame": "aquarium_header3.png"
    },
    "colors": {
      "frame": "#525151",
      "tab_background_text": "#010108"
    }
  },
  "version": "2.0",
  "name": "Inverse Aquarium",
  "manifest_version": 2,
  "description": "This is my first persona.. more a test to see what different image sizes are like as it was quite difficult to find the right position for my image... all made by hand using Gimp for Linux"
}