Examine source code of S4_Persona

{
  "theme": {
    "images": {
      "theme_frame": "S4_Persona_Trial.jpg"
    },
    "colors": {
      "frame": "#ff0000",
      "tab_background_text": "#c4c4c4"
    }
  },
  "version": "2.0",
  "name": "S4_Persona",
  "manifest_version": 2,
  "description": "New S4 Persona by Kaisame"
}