Examine source code of Winter Guard by MaDonna

{
  "name": "Winter Guard by MaDonna",
  "manifest_version": 2,
  "version": "3.0",
  "theme": {
    "images": {
      "theme_frame": "WintersGuardH.jpg"
    },
    "colors": {
      "toolbar": "rgba(0, 0, 0, 0)",
      "toolbar_field": "rgba(0, 0, 0, 0)",
      "toolbar_field_text": "rgba(56, 20, 20, 1)",
      "frame": "rgba(245, 245, 245, 0)",
      "tab_background_text": "rgba(59, 23, 23, 1)",
      "bookmark_text": "rgba(56, 20, 20, 1)"
    }
  }
}