Examine source code of dark graffiti

{
  "theme": {
    "images": {
      "theme_frame": "top.png"
    },
    "colors": {
      "frame": "#b013cf",
      "tab_background_text": "#4cd90f"
    }
  },
  "version": "2.0",
  "name": "dark graffiti",
  "manifest_version": 2,
  "description": "persona with black background and a colorful graffiti on top"
}