Examine source code of Rainy Day Rainbows

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Rainy Day",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.png"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(91, 210, 230, 0.4)",
      "toolbar_text": "rgb(28, 71, 227)",
      "frame": "rgb(162, 234, 235)",
      "tab_background_text": "rgb(54, 31, 127)",
      "toolbar_field": "rgba(91, 210, 230, 0.25)",
      "toolbar_field_text": "rgb(194, 242, 243)",
      "tab_line": "rgb(35, 156, 199)",
      "popup": "rgba(159, 119, 212, 0.6)",
      "popup_text": "rgb(240, 192, 240)",
      "button_background_active": "rgba(19, 186, 189, 0.6)",
      "button_background_hover": "rgb(130, 224, 226)",
      "frame_inactive": "rgb(194, 242, 243)",
      "icons": "rgb(46, 62, 189)",
      "ntp_background": "rgba(91, 210, 230, 0.3)",
      "ntp_text": "rgba(136, 47, 205, 0.6)",
      "popup_border": "rgba(205, 47, 185, 0.6)",
      "popup_highlight_text": "rgba(205, 47, 185, 0.6)",
      "sidebar_border": "rgb(239, 105, 5)",
      "sidebar_highlight_text": "rgb(201, 31, 207)",
      "sidebar_highlight": "rgb(182, 241, 177)",
      "sidebar_text": "rgb(9, 162, 40)",
      "sidebar": "rgb(158, 227, 229)",
      "tab_background_separator": "rgb(35, 160, 226)",
      "tab_selected": "rgb(144, 225, 227)",
      "tab_text": "rgb(32, 149, 211)",
      "toolbar_bottom_separator": "rgb(41, 42, 151)",
      "toolbar_field_border_focus": "rgb(162, 234, 235)",
      "toolbar_field_border": "rgb(43, 41, 151)",
      "toolbar_field_highlight_text": "rgba(91, 210, 230, 0.3)",
      "toolbar_field_highlight": "rgb(162, 234, 235)",
      "toolbar_field_separator": "rgb(194, 241, 243)",
      "toolbar_top_separator": "rgb(21, 131, 189)",
      "tab_loading": "rgb(35, 156, 199)"
    }
  }
}