Examine source code of despondency

{
  "manifest_version": 2,
  "version": "2.0",
  "name": "despondency",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-image.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(23, 30, 48)",
      "toolbar_text": "rgb(255, 255, 255)",
      "frame": "rgb(22, 24, 33)",
      "tab_background_text": "rgb(255, 255, 255)",
      "toolbar_field": "rgb(54, 58, 89)",
      "toolbar_field_text": "rgb(255, 255, 255)",
      "tab_line": "rgba(13, 13, 13, 0)",
      "popup": "rgb(31, 34, 61)",
      "popup_text": "rgb(215, 226, 239)",
      "button_background_active": "rgb(118, 60, 238)",
      "button_background_hover": "rgb(66, 66, 66)",
      "icons": "rgb(255, 255, 255)",
      "ntp_background": "rgb(22, 24, 33)",
      "ntp_text": "rgb(255, 255, 255)",
      "popup_border": "rgba(20, 255, 39, 0)",
      "tab_background_separator": "rgb(255, 255, 255)",
      "tab_selected": "rgb(242, 242, 242)",
      "tab_text": "rgb(44, 9, 9)",
      "toolbar_bottom_separator": "rgb(87, 87, 87)",
      "toolbar_field_border": "rgb(0, 0, 0)",
      "toolbar_top_separator": "rgb(87, 87, 87)",
      "tab_loading": "rgba(13, 13, 13, 0)"
    }
  }
}