Examine source code of X3

{
  "name": "X3",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "X3.png"
    },
    "colors": {
      "frame": "rgba(184, 212, 45, 1)",
      "tab_background_text": "rgba(84, 26, 128, 1)",
      "toolbar": "rgba(50, 201, 4, 1)",
      "bookmark_text": "rgba(84, 26, 128, 1)",
      "toolbar_field": "rgba(175, 247, 111, 1)",
      "toolbar_field_text": "rgba(84, 26, 128, 1)",
      "tab_line": "rgba(242, 228, 27, 1)"
    }
  }
}