Examine source code of Portugalforum.de

{
  "theme": {
    "images": {
      "theme_frame": "Personas_top.png"
    },
    "colors": {
      "frame": "#3aed37",
      "tab_background_text": "#e7f754"
    }
  },
  "version": "2.0",
  "name": "Portugallier",
  "manifest_version": 2
}