Examine source code of cool_green

{
  "theme": {
    "images": {
      "theme_frame": "green.jpg"
    },
    "colors": {
      "frame": "#03eb2d",
      "tab_background_text": "#faf7f7"
    }
  },
  "version": "2.0",
  "name": "cool_green",
  "manifest_version": 2,
  "description": "its a weird and a cool green...!join :D"
}