Examine source code of Sunset sky autumn

{
  "name": "Sunset-sky-autumn",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "Sunset-sky-autumn.png"
    },
    "colors": {
      "frame": "rgba(229, 230, 232, 1)",
      "tab_background_text": "rgba(201, 56, 56, 1)",
      "toolbar": "rgba(212, 171, 76, 0.9)",
      "bookmark_text": "rgba(201, 80, 80, 1)",
      "toolbar_field": "rgba(55, 127, 214, 0.65)",
      "toolbar_field_text": "rgba(227, 145, 145, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{7e37c327-7318-417d-8868-a3515a10a2b9}"
    }
  }
}