Examine source code of Hazard Line

{
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "#3f88a1",
      "tab_background_text": "#49de87"
    }
  },
  "version": "2.0",
  "name": "Hazard Line",
  "manifest_version": 2,
  "description": "Its a simple police line/hazard theme"
}