Examine source code of Testingthemexample

{
  "name": "Testingtheme",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "private-right.png"
    },
    "colors": {
      "frame": "rgba(178, 192, 222, 0.91)",
      "tab_background_text": "rgba(0, 0, 0, 1)",
      "toolbar": "rgba(128, 19, 19, 0.49)",
      "bookmark_text": "rgba(245, 17, 17, 1)",
      "toolbar_field": "rgba(219, 192, 192, 0.83)",
      "toolbar_field_text": "rgba(19, 45, 153, 1)"
    }
  }
}