Examine source code of Blue Checkerboard Theme

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Blue Checkerboard Theme",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.png"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "right top"
      ],
      "additional_backgrounds_tiling": [
        "repeat"
      ]
    },
    "colors": {
      "toolbar": "rgba(0, 0, 0, 0.5)",
      "toolbar_text": "rgb(161, 179, 255)",
      "frame": "rgb(0, 0, 0)",
      "tab_background_text": "rgb(153, 164, 212)",
      "toolbar_field": "rgba(0, 0, 0, 0.5)",
      "toolbar_field_text": "rgb(161, 179, 255)",
      "tab_line": "rgba(0, 0, 0, 0)",
      "popup": "rgba(3, 3, 15, 0.5)",
      "popup_text": "rgb(161, 179, 255)",
      "button_background_active": "rgb(7, 7, 51)",
      "button_background_hover": "rgb(27, 27, 79)",
      "frame_inactive": "rgb(28, 28, 187)",
      "icons_attention": "rgb(214, 229, 255)",
      "icons": "rgb(113, 140, 255)",
      "ntp_background": "rgb(2, 2, 17)",
      "ntp_text": "rgb(206, 215, 255)",
      "popup_border": "rgba(18, 18, 89, 0.5)",
      "popup_highlight_text": "rgb(212, 221, 255)",
      "popup_highlight": "rgb(17, 17, 41)",
      "sidebar_border": "rgb(17, 17, 74)",
      "sidebar_highlight_text": "rgb(224, 235, 255)",
      "sidebar_highlight": "rgb(46, 67, 106)",
      "sidebar_text": "rgb(161, 179, 255)",
      "sidebar": "rgb(9, 9, 37)",
      "tab_background_separator": "rgba(17, 17, 74, 0.5)",
      "tab_loading": "rgb(98, 113, 236)",
      "tab_selected": "rgba(52, 101, 234, 0.25)",
      "tab_text": "rgb(213, 228, 255)",
      "toolbar_bottom_separator": "rgba(17, 17, 74, 0.5)",
      "toolbar_field_border_focus": "rgba(27, 27, 104, 0.5)",
      "toolbar_field_border": "rgba(17, 17, 74, 0.5)",
      "toolbar_field_focus": "rgba(3, 3, 15, 0.5)",
      "toolbar_field_highlight_text": "rgb(213, 228, 255)",
      "toolbar_field_highlight": "rgb(27, 27, 104)",
      "toolbar_field_separator": "rgba(17, 17, 74, 0.5)",
      "toolbar_field_text_focus": "rgb(213, 228, 255)",
      "toolbar_top_separator": "rgba(17, 17, 74, 0.5)",
      "toolbar_vertical_separator": "rgba(17, 17, 74, 0.5)"
    }
  }
}