Examine source code of wind_mill

{
  "theme": {
    "images": {
      "theme_frame": "Free_High_resolution_nature1.JPG"
    },
    "colors": {
      "frame": "#620ac7",
      "tab_background_text": "#050505"
    }
  },
  "version": "2.0",
  "name": "wind_mill",
  "manifest_version": 2
}