Examine source code of Better Blue

{
  "name": "Better Blue",
  "manifest_version": 2,
  "version": "2.0",
  "theme": {
    "images": {
      "theme_frame": "blue 5.jpg"
    },
    "colors": {
      "toolbar": "rgba(11, 12, 74, 1)",
      "toolbar_field": "rgba(198, 222, 222, 1)",
      "toolbar_field_text": "rgba(0, 0, 0, 1)",
      "frame": "rgba(52, 13, 99, 1)",
      "tab_background_text": "rgba(252, 252, 247, 1)",
      "bookmark_text": "rgba(242, 252, 252, 1)"
    }
  }
}