Examine source code of City Lights Blue

{
  "theme": {
    "images": {
      "theme_frame": "city_lights_header.png"
    },
    "colors": {
      "frame": "#787878",
      "tab_background_text": "#000000"
    }
  },
  "version": "2.0",
  "name": "City Lights Blue",
  "manifest_version": 2,
  "description": "Bright and blurry lights from the city. all in shades of blue. Menus and icons on top are truly readable."
}