Examine source code of W10 Basic Blue

{
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "#37b2f0",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "W10 Basic Blue",
  "manifest_version": 2,
  "description": "Basic blue color pallet to match with Windows 10 theme."
}