Examine source code of Chrome Just Black

{
  "manifest_version": 2,
  "version": "2.0",
  "name": "Chrome Just Black",
  "theme": {
    "colors": {
      "toolbar": "#2d2d2d",
      "tab_line": "#2d2d2d",
      "tab_text": "#ffffff",
      "bookmark_text": "#f4f4f5",
      "frame": "#000000",
      "frame_inactive": "#000000",
      "tab_background_text": "#fefefe",
      "toolbar_field": "#202124",
      "toolbar_field_text": "#f4f4f5",
      "toolbar_field_text_focus": "#f4f4f5",
      "toolbar_field_focus": "#202124",
      "toolbar_field_border": "#202124",
      "toolbar_field_border_focus": "#49556a",
      "toolbar_field_highlight": "#185abc",
      "toolbar_field_highlight_text": "#ffffff",
      "toolbar_field_separator": "#7c7c7e",
      "toolbar_text": "#f4f4f5",
      "toolbar_top_separator": "#2d2d2d",
      "toolbar_bottom_separator": "#1f1f1f",
      "toolbar_vertical_separator": "#2d2d2d",
      "tab_background_separator": "#4e4e4e",
      "popup": "#292a2d",
      "popup_text": "#f4f4f5",
      "popup_border": "#242424",
      "popup_highlight": "#444547",
      "popup_highlight_text": "#ffffff",
      "tab_loading": "#f5f7ee",
      "tab_selected": "#2d2d2d",
      "sidebar": "#292a2d",
      "sidebar_highlight": "#4b4c4f",
      "sidebar_highlight_text": "#f4f4f5",
      "sidebar_text": "#fafafa",
      "sidebar_border": "#3c4043",
      "button_background_active": "#494949",
      "button_background_hover": "#3d3d3d",
      "icons": "#e0e0e0",
      "icons_attention": "#8ab4f8",
      "ntp_background": "#000000",
      "ntp_link": "#8a929a",
      "ntp_text": "#8a929a"
    }
  }
}