Examine source code of giannis v2

{
  "name": "giannis",
  "manifest_version": 2,
  "version": "2.0",
  "theme": {
    "images": {
      "theme_frame": "Untitled-2.jpg"
    },
    "colors": {
      "frame": "rgba(0, 81, 255, 1)",
      "tab_background_text": "rgba(245, 240, 199, 1)",
      "toolbar": "rgba(27, 92, 34, 1)",
      "bookmark_text": "rgba(186, 186, 186, 1)",
      "toolbar_field": "rgba(247, 238, 205, 1)",
      "toolbar_field_text": "rgba(0, 0, 0, 1)"
    }
  }
}