Examine source code of Watermellon

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Watermellon",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-019-7ce748211c61f9059493d4c4378e8a74.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(109, 172, 0)",
      "toolbar_text": "rgb(1, 13, 236)",
      "frame": "rgb(189, 83, 83)",
      "tab_background_text": "rgb(34, 5, 215)",
      "toolbar_field": "rgb(255, 255, 255)",
      "toolbar_field_text": "rgb(43, 13, 0)",
      "tab_line": "rgb(67, 11, 0)",
      "popup": "rgb(185, 211, 185)",
      "popup_text": "rgb(0, 0, 0)",
      "button_background_active": "rgb(161, 30, 2)",
      "button_background_hover": "rgb(189, 253, 97)",
      "frame_inactive": "rgb(255, 140, 0)",
      "icons_attention": "rgb(202, 95, 87)",
      "icons": "rgb(70, 44, 0)",
      "ntp_background": "rgb(170, 33, 24)",
      "ntp_text": "rgb(41, 29, 1)",
      "popup_border": "rgb(103, 204, 105)",
      "popup_highlight_text": "rgb(58, 255, 62)",
      "sidebar_border": "rgb(255, 19, 0)",
      "sidebar_highlight": "rgb(123, 60, 54)",
      "tab_loading": "rgb(67, 11, 0)"
    }
  }
}