Examine source code of Passing Clouds

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Passing Clouds",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.png"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "center top"
      ],
      "additional_backgrounds_tiling": [
        "repeat-x"
      ]
    },
    "colors": {
      "toolbar": "rgba(103, 175, 229, 0.54)",
      "toolbar_text": "rgb(0, 131, 255)",
      "frame": "rgb(64, 149, 185)",
      "tab_background_text": "rgb(118, 177, 236)",
      "toolbar_field": "rgba(202, 239, 255, 0.29)",
      "toolbar_field_text": "rgb(0, 131, 255)",
      "tab_line": "rgb(180, 217, 255)",
      "popup": "rgba(103, 175, 229, 0.54)",
      "popup_text": "rgb(0, 131, 255)",
      "button_background_active": "rgb(118, 177, 236)",
      "button_background_hover": "rgba(100, 189, 255, 0.44)",
      "frame_inactive": "rgb(118, 177, 236)",
      "icons": "rgb(214, 235, 255)",
      "ntp_text": "rgb(187, 206, 223)",
      "popup_highlight_text": "rgb(0, 131, 255)",
      "sidebar_border": "rgb(0, 131, 255)",
      "sidebar_highlight": "rgb(151, 200, 236)",
      "sidebar": "rgb(151, 200, 236)",
      "tab_loading": "rgb(155, 187, 210)",
      "tab_selected": "rgba(140, 210, 255, 0.45)",
      "tab_text": "rgb(0, 131, 255)",
      "toolbar_bottom_separator": "rgb(103, 175, 229)",
      "toolbar_field_border": "rgb(103, 175, 229)",
      "toolbar_field_focus": "rgb(187, 225, 251)",
      "toolbar_field_separator": "rgb(103, 175, 229)",
      "toolbar_top_separator": "rgb(103, 175, 229)",
      "toolbar_vertical_separator": "rgb(187, 225, 251)"
    }
  }
}