Examine source code of Eternal Garden

{
  "name": "Eternal Garden",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "Lichthimmel.png"
    },
    "colors": {
      "frame": "rgba(3, 138, 5, 0.34)",
      "tab_background_text": "rgba(156, 255, 222, 1)",
      "toolbar": "rgba(3, 138, 5, 0.55)",
      "bookmark_text": "rgba(255, 255, 255, 1)",
      "toolbar_field": "rgba(1, 64, 1, 0.55)",
      "toolbar_field_text": "rgba(156, 255, 222, 1)",
      "tab_line": "rgba(0, 176, 9, 0.34)"
    }
  }
}