Examine source code of Megumin-Konosuba

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Megumin",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.png"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right top"
      ],
      "additional_backgrounds_tiling": [
        "no-repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(239, 225, 226)",
      "toolbar_text": "rgb(125, 35, 54)",
      "frame": "rgb(201, 142, 143)",
      "tab_background_text": "rgb(253, 228, 228)",
      "toolbar_field": "rgba(255, 242, 242, 0.94)",
      "toolbar_field_text": "rgba(125, 35, 54, 0.86)",
      "tab_line": "rgb(247, 81, 72)",
      "popup": "rgb(125, 35, 54)",
      "popup_text": "rgb(253, 228, 228)",
      "tab_loading": "rgb(255, 52, 0)"
    }
  }
}