Examine source code of VRSTLdesign

{
  "theme": {
    "images": {
      "theme_frame": "untitled.JPG"
    },
    "colors": {
      "frame": "#f7f2f2",
      "tab_background_text": "#f5f5fa"
    }
  },
  "version": "2.0",
  "name": "VRSTLdesign",
  "manifest_version": 2
}