Examine source code of The Green Gradient

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Green Gradient",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.png",
        "images/1.png",
        "images/2.png"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right top",
        "right top",
        "right top"
      ],
      "additional_backgrounds_tiling": [
        "repeat",
        "repeat",
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(50, 50, 50)",
      "toolbar_text": "rgb(200, 221, 147)",
      "frame": "rgb(49, 53, 37)",
      "tab_background_text": "rgb(191, 199, 162)",
      "toolbar_field": "rgb(55, 53, 53)",
      "toolbar_field_text": "rgb(200, 221, 147)",
      "tab_line": "rgb(77, 77, 77)",
      "popup": "rgb(50, 50, 50)",
      "popup_text": "rgb(174, 192, 134)",
      "button_background_active": "rgba(218, 233, 181, 0.57)",
      "button_background_hover": "rgba(18, 18, 18, 0.3)",
      "icons_attention": "rgb(86, 86, 52)",
      "icons": "rgb(193, 255, 0)",
      "ntp_background": "rgb(54, 59, 38)",
      "ntp_text": "rgba(200, 221, 147, 0.57)",
      "sidebar_border": "rgb(180, 252, 0)",
      "sidebar_highlight_text": "rgb(51, 51, 51)",
      "sidebar_highlight": "rgb(200, 221, 147)",
      "sidebar_text": "rgb(176, 233, 93)",
      "sidebar": "rgb(51, 51, 51)",
      "toolbar_bottom_separator": "rgb(50, 50, 50)",
      "toolbar_field_border": "rgb(151, 198, 46)",
      "toolbar_top_separator": "rgb(50, 50, 50)",
      "toolbar_vertical_separator": "rgb(89, 88, 90)",
      "tab_loading": "rgb(77, 77, 77)"
    }
  }
}