Examine source code of Traditional Roofs

{
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "#291b07",
      "tab_background_text": "#73d622"
    }
  },
  "version": "2.0",
  "name": "Traditional Roofs",
  "manifest_version": 2,
  "description": "Roofs from Graz, Austria. A small theme made from a photo taken with my Phone."
}