Examine source code of Cool Lines

{
  "theme": {
    "images": {
      "theme_frame": "FFB.jpg"
    },
    "colors": {
      "frame": "#4d4d4d",
      "tab_background_text": "#998b8b"
    }
  },
  "version": "2.0",
  "name": "Cool Lines",
  "manifest_version": 2,
  "description": "A very blue persona"
}