Examine source code of Green Circle

{
  "theme": {
    "images": {
      "theme_frame": "Persona_Header_greencircle.jpg"
    },
    "colors": {
      "frame": "rgba(229,230,232,1)",
      "tab_background_text": "#000"
    }
  },
  "version": "2.0",
  "name": "Green Circle",
  "manifest_version": 2,
  "description": "its a simple theme without hd Graphic!\nfor wishes or other colour or other ideas..\npls mail to me"
}