Examine source code of Telegram Dark

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Telegram Dark",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-000-5672c42860d5b06e1058dc477397f3ef.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(23, 33, 43)",
      "toolbar_text": "rgb(255, 255, 255)",
      "frame": "rgb(14, 22, 33)",
      "tab_background_text": "rgb(255, 255, 255)",
      "toolbar_field": "rgb(36, 47, 61)",
      "toolbar_field_text": "rgb(255, 255, 255)",
      "tab_line": "rgba(23, 33, 43, 0)",
      "popup": "rgb(23, 33, 43)",
      "popup_text": "rgb(255, 255, 255)",
      "button_background_active": "rgb(94, 181, 247)",
      "button_background_hover": "rgb(36, 47, 61)",
      "icons_attention": "rgb(94, 181, 247)",
      "icons": "rgb(118, 140, 158)",
      "ntp_background": "rgb(14, 22, 33)",
      "popup_border": "rgba(36, 47, 61, 0)",
      "tab_selected": "rgb(43, 82, 120)",
      "toolbar_bottom_separator": "rgba(14, 22, 33, 0)",
      "toolbar_top_separator": "rgba(14, 22, 33, 0)",
      "tab_loading": "rgba(23, 33, 43, 0)"
    }
  }
}