Examine source code of Destination sunset

{
  "name": "Destination sunset",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "WK-sunset-tempt.png"
    },
    "colors": {
      "frame": "rgba(229, 230, 232, 1)",
      "tab_background_text": "rgba(0, 0, 0, 1)",
      "toolbar": "rgba(255, 255, 255, 0.53)",
      "bookmark_text": "rgba(0, 0, 0, 1)",
      "toolbar_field": "rgba(255, 255, 255, 0.64)",
      "toolbar_field_text": "rgba(0, 0, 0, 1)",
      "tab_line": "rgba(255, 255, 255, 0.64)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{dbb3a65f-b6d2-4353-8bbb-6b812540e99e}"
    }
  }
}