Examine source code of music notes1

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "music1",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.jpg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "center bottom"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(170, 21, 173, 0.57)",
      "toolbar_text": "rgb(23, 255, 38)",
      "frame": "rgb(97, 2, 141)",
      "tab_background_text": "rgb(23, 255, 38)",
      "toolbar_field": "rgba(93, 12, 175, 0.59)",
      "toolbar_field_text": "rgb(31, 255, 0)",
      "tab_line": "rgb(31, 255, 0)",
      "popup": "rgb(129, 14, 127)",
      "popup_text": "rgb(31, 255, 0)",
      "tab_loading": "rgb(31, 255, 0)"
    }
  }
}