Examine source code of my first backgraund

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "colors  backgraund",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/bg-045-3e6898966e6ccdc87f80d23d4e7a6a49.svg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(0, 1, 8)",
      "toolbar_text": "rgb(255, 255, 255)",
      "frame": "rgb(27, 28, 29)",
      "tab_background_text": "rgb(17, 209, 248)",
      "toolbar_field": "rgb(247, 248, 252)",
      "toolbar_field_text": "rgb(0, 3, 6)",
      "tab_line": "rgb(17, 209, 248)",
      "popup": "rgb(70, 90, 117)",
      "popup_text": "rgb(17, 209, 248)",
      "button_background_active": "rgb(42, 155, 183)",
      "button_background_hover": "rgb(51, 138, 153)",
      "frame_inactive": "rgb(101, 177, 253)",
      "icons_attention": "rgb(0, 125, 251)",
      "icons": "rgb(2, 126, 251)",
      "ntp_background": "rgb(247, 251, 253)",
      "ntp_text": "rgb(0, 2, 6)",
      "popup_border": "rgb(255, 255, 255)",
      "popup_highlight_text": "rgb(17, 209, 248)",
      "popup_highlight": "rgb(36, 98, 109)",
      "sidebar_border": "rgb(0, 0, 0)",
      "sidebar_highlight_text": "rgb(205, 197, 247)",
      "sidebar_highlight": "rgb(74, 72, 81)",
      "sidebar_text": "rgb(3, 0, 11)",
      "sidebar": "rgb(112, 111, 117)",
      "tab_background_separator": "rgb(115, 94, 180)",
      "tab_loading": "rgb(7, 209, 255)",
      "tab_selected": "rgb(87, 151, 165)",
      "tab_text": "rgb(0, 10, 13)",
      "toolbar_bottom_separator": "rgb(130, 193, 211)",
      "toolbar_field_border_focus": "rgb(131, 172, 184)",
      "toolbar_field_border": "rgb(7, 209, 255)",
      "toolbar_field_focus": "rgb(194, 208, 211)",
      "toolbar_field_highlight_text": "rgb(247, 251, 253)",
      "toolbar_field_highlight": "rgb(108, 118, 162)",
      "toolbar_field_separator": "rgb(247, 248, 252)",
      "toolbar_field_text_focus": "rgb(27, 28, 29)",
      "toolbar_top_separator": "rgb(17, 209, 248)",
      "toolbar_vertical_separator": "rgb(17, 209, 248)"
    }
  }
}