Examine source code of JOY ...

{
  "theme": {
    "images": {
      "theme_frame": "pots.jpg"
    },
    "colors": {
      "frame": "#ffbf00",
      "tab_background_text": "#1a4f00"
    }
  },
  "version": "2.0",
  "name": "JOY ...",
  "manifest_version": 2,
  "description": "Petits pots de Fleurs,\nHappy Flowers,Flowerpots,Garden,\nJardin,Dahlia,Romarin,Thym,Rose,\nHortensias,Menthe,Yellow,Green ,\nHydrangéas,Pink,Nature,Organic,\nHolidays,Campaign,Little,Country,\nGrass,Pink,White,Apple,Orange ..."
}