Examine source code of Simple FX

{
  "name": "Simple FX",
  "manifest_version": 2,
  "version": "4.0",
  "theme": {
    "images": {
      "theme_frame": "banner-transparent-geometric-1.png"
    },
    "colors": {
      "toolbar": "rgba(82, 102, 191, 0.89)",
      "toolbar_field": "rgba(222, 225, 255, 1)",
      "frame": "rgba(54, 78, 130, 1)",
      "tab_background_text": "rgba(222, 225, 255, 1)",
      "bookmark_text": "rgba(255, 255, 255, 1)"
    }
  }
}