Examine source code of Megumin

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Megumin",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.png"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(214, 81, 109, 0.01)",
      "toolbar_text": "rgb(180, 63, 88)",
      "frame": "rgb(0, 158, 255)",
      "tab_background_text": "rgb(218, 76, 104)",
      "toolbar_field": "rgb(252, 252, 252)",
      "toolbar_field_text": "rgb(242, 104, 132)",
      "tab_line": "rgb(214, 81, 109)",
      "popup": "rgb(255, 255, 255)",
      "popup_text": "rgb(177, 63, 87)",
      "tab_selected": "rgb(255, 255, 255)",
      "tab_loading": "rgb(214, 81, 109)"
    }
  }
}