Examine source code of grass during sunset

{
  "name": "grass-during-sunset",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "grass-during-sunset.png"
    },
    "colors": {
      "frame": "rgba(229, 230, 232, 1)",
      "tab_background_text": "rgba(206, 210, 214, 1)",
      "toolbar": "rgba(167, 191, 209, 1)",
      "bookmark_text": "rgba(252, 73, 73, 1)",
      "toolbar_field": "rgba(227, 18, 18, 1)",
      "toolbar_field_text": "rgba(0, 16, 161, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{f0779141-2d4f-4d9b-8434-b93abd032e6c}"
    }
  }
}