Examine source code of United kingdom theme

{
  "name": "2020-04-29 10.13.52",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "2020-07-02 (1).png"
    },
    "colors": {
      "frame": "rgba(0, 80, 252, 1)",
      "tab_background_text": "rgba(11, 158, 207, 1)",
      "toolbar": "rgba(255, 8, 8, 1)",
      "bookmark_text": "rgba(26, 108, 201, 1)",
      "toolbar_field": "rgba(27, 90, 207, 1)",
      "toolbar_field_text": "rgba(76, 53, 161, 1)"
    }
  }
}