Examine source code of Planetary Surface 7

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Volcanic crater",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.jpg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right center"
      ],
      "additional_backgrounds_tiling": [
        "no-repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(9, 75, 99, 0)",
      "toolbar_text": "rgb(75, 190, 233)",
      "frame": "rgb(4, 7, 7)",
      "tab_background_text": "rgb(188, 138, 247)",
      "toolbar_field": "rgba(9, 75, 99, 0)",
      "toolbar_field_text": "rgb(255, 124, 0)",
      "tab_line": "rgb(255, 124, 0)",
      "popup": "rgb(45, 23, 68)",
      "popup_text": "rgb(75, 190, 233)",
      "button_background_active": "rgb(225, 250, 112)",
      "button_background_hover": "rgba(17, 123, 162, 0.27)",
      "icons_attention": "rgb(255, 172, 0)",
      "icons": "rgb(255, 124, 0)",
      "ntp_background": "rgba(35, 26, 48, 0.92)",
      "ntp_text": "rgb(255, 124, 0)",
      "popup_highlight_text": "rgb(38, 246, 229)",
      "sidebar_border": "rgb(225, 250, 112)",
      "sidebar_highlight_text": "rgb(225, 250, 112)",
      "sidebar_highlight": "rgb(255, 172, 0)",
      "sidebar_text": "rgb(225, 250, 112)",
      "sidebar": "rgb(75, 190, 233)",
      "tab_background_separator": "rgba(11, 7, 0, 0)",
      "tab_selected": "rgba(17, 123, 162, 0.3)",
      "tab_text": "rgb(225, 250, 112)",
      "toolbar_bottom_separator": "rgba(3, 75, 119, 0)",
      "toolbar_field_border": "rgba(3, 75, 119, 0)",
      "toolbar_field_separator": "rgba(3, 75, 119, 0)",
      "toolbar_top_separator": "rgba(3, 75, 119, 0)",
      "tab_loading": "rgb(255, 124, 0)"
    }
  }
}