Examine source code of aesthetic night sky

{
  "name": "aesthetic night sky",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "Kimi no na wa.jpg"
    },
    "colors": {
      "frame": "rgba(224, 156, 255, 1)",
      "tab_background_text": "rgba(255, 255, 255, 1)",
      "toolbar": "rgba(115, 95, 176, 1)",
      "bookmark_text": "rgba(255, 255, 255, 1)",
      "toolbar_field": "rgba(212, 212, 212, 1)",
      "toolbar_field_text": "rgba(0, 0, 0, 1)"
    }
  }
}