Examine source code of Dark Theme 2

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Theme",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-000-5672c42860d5b06e1058dc477397f3ef.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(24, 24, 24)",
      "toolbar_text": "rgb(196, 196, 196)",
      "frame": "rgb(32, 32, 32)",
      "tab_background_text": "rgb(165, 165, 165)",
      "toolbar_field": "rgb(18, 18, 18)",
      "toolbar_field_text": "rgb(181, 179, 179)",
      "tab_line": "rgb(69, 69, 69)",
      "popup": "rgb(32, 32, 32)",
      "popup_text": "rgb(170, 170, 170)",
      "icons_attention": "rgb(163, 166, 161)",
      "icons": "rgb(143, 143, 143)",
      "ntp_background": "rgb(18, 18, 18)",
      "tab_selected": "rgb(24, 24, 24)",
      "tab_text": "rgb(187, 187, 187)",
      "toolbar_bottom_separator": "rgb(24, 24, 24)",
      "toolbar_field_border_focus": "rgb(106, 106, 106)",
      "toolbar_field_border": "rgb(69, 69, 69)",
      "toolbar_field_separator": "rgb(166, 162, 179)",
      "toolbar_top_separator": "rgb(24, 24, 24)",
      "tab_loading": "rgb(69, 69, 69)"
    }
  }
}