Examine source code of Winter Collage by MaDonna

{
  "theme": {
    "images": {
      "theme_frame": "7Custom.jpg"
    },
    "colors": {
      "frame": "#0f0b1f",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "Winter Collage by MaDonna",
  "manifest_version": 2,
  "description": "Designed by MaDonna"
}