Examine source code of f-1

{
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "#c7e3dd",
      "tab_background_text": "#9edbd1"
    }
  },
  "version": "2.0",
  "name": "f-1",
  "manifest_version": 2,
  "description": "This is the 1st theme from favgen."
}