Examine source code of Taiko Purple

{
  "theme": {
    "images": {
      "theme_frame": "taiko_persona_purple.jpg"
    },
    "colors": {
      "frame": "#000000",
      "tab_background_text": "#000000"
    }
  },
  "version": "2.0",
  "name": "Taiko Purple",
  "manifest_version": 2,
  "description": "Taiko: the Japanese drums, now in your Firefox"
}