Examine source code of Geometry Nebula

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Geometry Nebula",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.png"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "center center"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(81, 43, 88, 0.47)",
      "toolbar_text": "rgb(210, 250, 251)",
      "frame": "rgb(44, 0, 62)",
      "tab_background_text": "rgb(156, 128, 163)",
      "toolbar_field": "rgba(255, 30, 86, 0.4)",
      "toolbar_field_text": "rgb(210, 250, 251)",
      "tab_line": "rgb(255, 30, 86)",
      "popup": "rgb(81, 43, 88)",
      "popup_text": "rgb(155, 192, 192)",
      "tab_loading": "rgb(255, 30, 86)"
    }
  }
}