Examine source code of Active Boldness

{
  "name": "Active Boldness",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "gold-pattern.png"
    },
    "colors": {
      "frame": "rgba(55, 61, 145, 1)",
      "tab_background_text": "rgba(14, 201, 230, 1)",
      "toolbar": "rgba(30, 106, 168, 1)",
      "bookmark_text": "rgba(16, 230, 102, 1)",
      "toolbar_field": "rgba(53, 118, 171, 1)",
      "toolbar_field_text": "rgba(16, 230, 102, 1)"
    }
  }
}