Examine source code of Dark Magic

{
  "manifest_version": 2,
  "version": "0.2",
  "name": "DarkMagic",
  "author": "Artyom Polyanskiy",
  "theme": {
    "colors": {
      "button_background_active": "#333333",
      "button_background_hover": "#282828",
      "bookmark_text": "white",
      "frame": "#000000",
      "frame_inactive": "#000000",
      "icons": "#e6e6e6",
      "icons_attention": "#9400ff",
      "ntp_background": "#000000",
      "ntp_text": "white",
      "popup": "#181818",
      "popup_border": "#303030",
      "popup_highlight": "#303030",
      "popup_highlight_text": "white",
      "popup_text": "white",
      "sidebar": "#181818",
      "sidebar_border": "#303030",
      "sidebar_highlight": "#303030",
      "sidebar_highlight_text": "white",
      "sidebar_text": "white",
      "tab_background_separator": "#303030",
      "tab_line": "#9400ff",
      "tab_loading": "white",
      "tab_selected": "#181818",
      "tab_text": "white",
      "tab_background_text": "white",
      "toolbar": "#181818",
      "toolbar_bottom_separator": "#181818",
      "toolbar_field": "#000000",
      "toolbar_field_border": "#181818",
      "toolbar_field_border_focus": "#303030",
      "toolbar_field_focus": "#111111",
      "toolbar_field_highlight": "#333333",
      "toolbar_field_highlight_text": "white",
      "toolbar_field_separator": "#181818",
      "toolbar_field_text": "white",
      "toolbar_field_text_focus": "white",
      "toolbar_top_separator": "#181818",
      "toolbar_vertical_separator": "#181818"
    }
  }
}