Examine source code of Magic Blue Lines

{
  "theme": {
    "images": {
      "theme_frame": "Magic_Blue.jpg"
    },
    "colors": {
      "frame": "#0029bf",
      "tab_background_text": "#0029bf"
    }
  },
  "version": "2.0",
  "name": "Magic Blue Lines",
  "manifest_version": 2,
  "description": "Found a wallpaper on zedge."
}