Examine source code of Blue Elegant

{
  "name": "Blue Dark",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "moz.jpg"
    },
    "colors": {
      "frame": "rgba(4, 14, 38, 1)",
      "tab_background_text": "rgba(255, 255, 255, 1)",
      "toolbar": "rgba(30, 26, 66, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{c729c439-50b7-4110-a423-0cc0452a251e}"
    }
  }
}