Examine source code of phragmites

{
  "theme": {
    "images": {
      "theme_frame": "phragmites.png"
    },
    "colors": {
      "frame": "#29230b",
      "tab_background_text": "#f5e3bf"
    }
  },
  "version": "2.0",
  "name": "phragmites",
  "manifest_version": 2,
  "description": "phragmites roseaux marais sunset sunrise dawn aube crepuscule sun marsh warbler reeds marshes"
}