Examine source code of lego dark

{
  "theme": {
    "images": {
      "theme_frame": "legodarknephco.jpg"
    },
    "colors": {
      "frame": "#172242",
      "tab_background_text": "#a9aed6"
    }
  },
  "version": "2.0",
  "name": "lego dark",
  "manifest_version": 2,
  "description": "legos with navy background"
}