Examine source code of export 2

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "rainbow",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.jpg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(63, 63, 63, 0)",
      "toolbar_text": "rgba(0, 0, 0, 0.4)",
      "frame": "rgb(148, 148, 148)",
      "tab_background_text": "rgb(0, 0, 0)",
      "toolbar_field": "rgba(63, 63, 63, 0)",
      "toolbar_field_text": "rgba(84, 84, 84, 0)",
      "tab_line": "rgba(248, 112, 140, 0)",
      "popup": "rgb(197, 197, 197)",
      "popup_text": "rgb(0, 0, 0)",
      "button_background_hover": "rgba(255, 255, 255, 0.31)",
      "icons": "rgba(255, 255, 255, 0.75)",
      "popup_border": "rgba(255, 255, 255, 0)",
      "sidebar_border": "rgba(255, 2, 2, 0)",
      "tab_background_separator": "rgba(251, 57, 57, 0)",
      "tab_selected": "rgba(255, 158, 158, 0.18)",
      "toolbar_bottom_separator": "rgba(252, 54, 54, 0)",
      "toolbar_field_border": "rgba(78, 22, 22, 0)",
      "toolbar_field_highlight_text": "rgba(164, 95, 95, 0)",
      "toolbar_field_separator": "rgba(133, 85, 85, 0)",
      "toolbar_top_separator": "rgba(13, 0, 0, 0)",
      "tab_loading": "rgba(248, 112, 140, 0)"
    }
  }
}