Examine source code of Batman Cool

{
  "name": "Batman",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "Ben-Affleck-Batman-V-Superman-Power-Armor(4).jpg"
    },
    "colors": {
      "frame": "rgba(8, 8, 8, 1)",
      "tab_background_text": "rgba(25, 200, 227, 1)",
      "toolbar": "rgba(0, 0, 0, 0)",
      "bookmark_text": "rgba(25, 200, 227, 1)",
      "toolbar_field": "rgba(230, 177, 32, 0)",
      "toolbar_field_text": "rgba(245, 10, 10, 1)"
    }
  }
}