Examine source code of regional train

{
  "name": "regional train",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "6652r 1964x92 klaar.jpg"
    },
    "colors": {
      "frame": "rgba(222, 229, 247, 0)",
      "tab_background_text": "rgba(9, 242, 25, 1)",
      "toolbar": "rgba(225, 231, 250, 0)",
      "bookmark_text": "rgba(0, 238, 255, 1)",
      "toolbar_field": "rgba(225, 231, 250, 0.72)",
      "toolbar_field_text": "rgba(10, 245, 25, 1)",
      "tab_line": "rgba(0, 238, 255, 1)"
    }
  }
}