Examine source code of EarthZone

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "EarthZone",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-002-609370e89a219e0548ac5ef6b4a7dd2e.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(24, 108, 144)",
      "toolbar_text": "rgb(255, 219, 36)",
      "frame": "rgb(196, 95, 2)",
      "tab_background_text": "rgb(255, 255, 255)",
      "toolbar_field": "rgb(29, 97, 119)",
      "toolbar_field_text": "rgba(255, 255, 255, 0.87)",
      "tab_line": "rgb(255, 216, 18)",
      "popup": "rgb(255, 216, 18)",
      "popup_text": "rgb(24, 108, 144)",
      "frame_inactive": "rgb(70, 127, 142)",
      "icons_attention": "rgba(255, 255, 255, 0.92)",
      "popup_highlight_text": "rgb(255, 255, 255)",
      "popup_highlight": "rgb(24, 108, 144)",
      "sidebar_border": "rgb(29, 97, 119)",
      "sidebar_highlight_text": "rgb(255, 216, 18)",
      "sidebar_highlight": "rgb(29, 97, 119)",
      "sidebar_text": "rgba(229, 247, 243, 0.68)",
      "sidebar": "rgb(32, 66, 76)",
      "tab_loading": "rgba(255, 216, 18, 0.65)",
      "tab_selected": "rgb(24, 108, 144)",
      "tab_text": "rgb(255, 219, 36)",
      "toolbar_bottom_separator": "rgb(86, 127, 138)",
      "toolbar_field_border_focus": "rgba(255, 216, 18, 0.65)",
      "toolbar_field_border": "rgba(229, 247, 243, 0.44)",
      "toolbar_field_focus": "rgb(255, 216, 18)",
      "toolbar_field_highlight_text": "rgb(255, 255, 255)",
      "toolbar_field_highlight": "rgb(196, 95, 2)",
      "toolbar_field_separator": "rgba(229, 247, 243, 0.21)",
      "toolbar_field_text_focus": "rgb(24, 108, 144)",
      "toolbar_vertical_separator": "rgba(255, 216, 18, 0.47)"
    }
  }
}