Examine source code of Music Key

{
  "theme": {
    "images": {
      "theme_frame": "music_keys.jpg"
    },
    "colors": {
      "frame": "#d9d630",
      "tab_background_text": "#1babb5"
    }
  },
  "version": "2.0",
  "name": "Music Key",
  "manifest_version": 2,
  "description": "Slide colors basis in blue"
}