Examine source code of F90 Dark

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "F90 Dark",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-000-5672c42860d5b06e1058dc477397f3ef.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(28, 27, 33)",
      "toolbar_text": "rgb(234, 234, 234)",
      "frame": "rgb(9, 15, 18)",
      "tab_background_text": "rgb(171, 171, 171)",
      "toolbar_field": "rgb(19, 16, 27)",
      "toolbar_field_text": "rgb(255, 255, 255)",
      "tab_line": "rgb(77, 70, 110)",
      "popup": "rgb(28, 27, 33)",
      "popup_text": "rgb(255, 255, 255)",
      "button_background_active": "rgb(136, 136, 136)",
      "button_background_hover": "rgb(43, 41, 59)",
      "icons_attention": "rgb(0, 47, 255)",
      "icons": "rgb(205, 205, 205)",
      "ntp_background": "rgb(28, 27, 33)",
      "popup_border": "rgb(36, 34, 42)",
      "sidebar_border": "rgb(36, 34, 42)",
      "sidebar_highlight": "rgb(69, 85, 209)",
      "sidebar_text": "rgb(255, 255, 255)",
      "sidebar": "rgb(28, 27, 33)",
      "tab_loading": "rgb(174, 166, 255)",
      "tab_selected": "rgb(36, 34, 42)",
      "toolbar_field_border_focus": "rgb(75, 68, 96)",
      "toolbar_field_border": "rgb(61, 59, 74)",
      "toolbar_field_focus": "rgb(36, 34, 42)",
      "toolbar_field_highlight": "rgb(82, 78, 111)",
      "toolbar_field_separator": "rgb(60, 57, 77)",
      "toolbar_top_separator": "rgb(48, 46, 59)"
    }
  }
}