Examine source code of My Horse Red

{
  "theme": {
    "images": {
      "theme_frame": "PersonnaRed.jpg"
    },
    "colors": {
      "frame": "#f00c0c",
      "tab_background_text": "#f7e11b"
    }
  },
  "version": "2.0",
  "name": "My Horse Red",
  "manifest_version": 2,
  "description": "Red with brush in the background"
}