Examine source code of concierto_force

{
  "name": "concierto_force",
  "manifest_version": 2,
  "version": "2.0",
  "theme": {
    "images": {
      "theme_frame": "IMG_5648.JPG"
    },
    "colors": {
      "toolbar": "rgba(71, 1, 1, 1)",
      "toolbar_field": "rgba(245, 201, 201, 1)",
      "toolbar_field_text": "rgba(219, 31, 31, 1)",
      "frame": "rgba(231, 234, 240, 1)",
      "tab_background_text": "rgba(235, 217, 217, 1)",
      "bookmark_text": "rgba(10, 3, 3, 1)"
    }
  }
}