Examine source code of Simply Blurple

{
  "manifest_version": 2,
  "version": "1.1",
  "name": "Simply Blurple",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-000-5672c42860d5b06e1058dc477397f3ef.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(38, 41, 42)",
      "toolbar_text": "rgb(207, 199, 199)",
      "frame": "rgb(0, 0, 0)",
      "tab_background_text": "rgb(255, 255, 255)",
      "toolbar_field": "rgb(33, 33, 34)",
      "toolbar_field_text": "rgb(207, 207, 215)",
      "tab_line": "rgb(88, 101, 242)",
      "popup": "rgb(51, 51, 51)",
      "popup_text": "rgb(255, 255, 255)",
      "button_background_active": "rgb(88, 101, 242)",
      "frame_inactive": "rgb(33, 33, 34)",
      "icons": "rgb(220, 213, 201)",
      "ntp_background": "rgb(20, 20, 20)",
      "ntp_text": "rgb(255, 255, 255)",
      "sidebar_border": "rgb(88, 101, 242)",
      "sidebar_highlight": "rgb(88, 101, 242)",
      "sidebar": "rgb(116, 91, 53)",
      "tab_selected": "rgb(88, 101, 242)",
      "tab_text": "rgb(0, 0, 0)",
      "toolbar_bottom_separator": "rgb(8, 8, 8)",
      "toolbar_top_separator": "rgb(0, 0, 0)",
      "tab_loading": "rgb(88, 101, 242)"
    }
  }
}