Examine source code of SimpleStarsDark

{
  "name": "Galaxy",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "galaxy banner.jpg"
    },
    "colors": {
      "frame": "rgba(0, 0, 0, 1)",
      "tab_background_text": "rgba(214, 214, 214, 1)",
      "toolbar": "rgba(97, 97, 97, 0.39)",
      "bookmark_text": "rgba(214, 214, 214, 1)",
      "toolbar_field": "rgba(10, 10, 10, 0.79)",
      "toolbar_field_text": "rgba(204, 204, 204, 1)"
    }
  }
}