Examine source code of Silk Noir

{
  "manifest_version": 2,
  "version": "5.2",
  "name": "Silk Noir",
  "theme": {
    "images": {
      "additional_backgrounds": [
        "images/0.png",
        "images/1.png",
        "images/2.png"
      ]
    },
    "properties": {
      "additional_backgrounds_alignment": [
        "left top",
        "right top",
        "right top"
      ],
      "additional_backgrounds_tiling": [
        "no-repeat",
        "repeat-x",
        "no-repeat"
      ]
    },
    "colors": {
      "toolbar": "rgb(83, 83, 83)",
      "toolbar_text": "rgb(248, 248, 248)",
      "frame": "rgb(42, 42, 42)",
      "tab_background_text": "rgb(128, 128, 128)",
      "toolbar_field": "rgb(66, 66, 66)",
      "toolbar_field_text": "rgb(172, 172, 172)",
      "tab_line": "rgba(255, 255, 255, 0.31)",
      "popup": "rgb(62, 62, 62)",
      "popup_text": "rgb(233, 233, 233)",
      "button_background_active": "rgb(62, 62, 62)",
      "button_background_hover": "rgb(72, 72, 72)",
      "icons_attention": "rgb(255, 255, 255)",
      "icons": "rgb(223, 223, 223)",
      "popup_border": "rgba(154, 154, 154, 0.15)",
      "popup_highlight_text": "rgb(245, 245, 245)",
      "popup_highlight": "rgb(124, 124, 124)",
      "sidebar_border": "rgba(154, 154, 154, 0.15)",
      "sidebar_highlight_text": "rgb(245, 245, 245)",
      "sidebar_highlight": "rgb(124, 124, 124)",
      "sidebar_text": "rgb(248, 248, 248)",
      "sidebar": "rgb(62, 62, 62)",
      "tab_loading": "rgba(255, 255, 255, 0.22)",
      "tab_text": "rgb(255, 255, 255)",
      "toolbar_bottom_separator": "rgba(255, 255, 255, 0.22)",
      "toolbar_field_border_focus": "rgb(36, 36, 36)",
      "toolbar_field_border": "rgb(90, 90, 90)",
      "toolbar_field_focus": "rgb(48, 48, 48)",
      "toolbar_field_highlight_text": "rgb(0, 0, 0)",
      "toolbar_field_highlight": "rgb(124, 124, 124)",
      "toolbar_field_text_focus": "rgb(199, 199, 199)"
    }
  }
}