Examine source code of Dangerous time

{
  "name": "светкавици",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "светкавици.jpg"
    },
    "colors": {
      "frame": "rgba(0, 3, 8, 1)",
      "tab_background_text": "rgba(210, 200, 230, 1)",
      "toolbar": "rgba(200, 192, 224, 0.13)",
      "bookmark_text": "rgba(210, 200, 230, 1)",
      "toolbar_field": "rgba(6, 1, 26, 0.23)",
      "toolbar_field_text": "rgba(210, 200, 230, 1)"
    }
  }
}