Examine source code of arty

{
  "name": "art",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "photo-1541701494587-cb58502866ab.jpeg"
    },
    "colors": {
      "frame": "rgba(209, 0, 14, 0.79)",
      "tab_background_text": "rgba(0, 0, 0, 0)",
      "toolbar": "rgba(0, 0, 0, 0.31)",
      "bookmark_text": "rgba(0, 0, 0, 0)",
      "toolbar_field_text": "rgba(0, 0, 0, 0)"
    }
  }
}