Examine source code of My Dark Mountain Theme

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "My Dark Mountain Theme",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.jpg"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "center center"
      ],
      "additional_backgrounds_tiling": [
        "no-repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(31, 31, 33)",
      "toolbar_text": "rgb(255, 255, 255)",
      "frame": "rgb(41, 41, 44)",
      "tab_background_text": "rgb(255, 255, 255)",
      "toolbar_field": "rgba(0, 0, 0, 0.91)",
      "toolbar_field_text": "rgb(255, 255, 255)",
      "tab_line": "rgba(0, 94, 255, 0.32)",
      "popup": "rgb(0, 0, 0)",
      "popup_text": "rgb(255, 255, 255)",
      "button_background_active": "rgb(69, 69, 70)",
      "ntp_background": "rgb(0, 0, 0)",
      "ntp_text": "rgb(255, 255, 255)",
      "popup_border": "rgba(0, 0, 0, 0)",
      "popup_highlight_text": "rgb(255, 255, 255)",
      "sidebar_border": "rgba(0, 0, 0, 0)",
      "sidebar_highlight": "rgba(0, 0, 0, 0)",
      "sidebar_text": "rgb(255, 255, 255)",
      "sidebar": "rgb(0, 0, 0)",
      "tab_background_separator": "rgba(255, 255, 255, 0)",
      "toolbar_bottom_separator": "rgba(0, 0, 0, 0.73)",
      "toolbar_field_border_focus": "rgb(55, 173, 255)",
      "toolbar_field_border": "rgba(0, 0, 0, 0)",
      "toolbar_field_focus": "rgb(0, 0, 0)",
      "toolbar_field_highlight_text": "rgb(255, 255, 255)",
      "toolbar_field_highlight": "rgba(14, 107, 225, 0.88)",
      "toolbar_field_text_focus": "rgb(255, 255, 255)",
      "toolbar_top_separator": "rgba(0, 0, 0, 0)",
      "toolbar_vertical_separator": "rgb(92, 92, 92)",
      "tab_loading": "rgba(0, 94, 255, 0.32)"
    }
  }
}