Examine source code of Dark + Orange

{
  "manifest_version": 2,
  "version": "2.0",
  "name": "dark + orange",
  "theme": {
    "images": {},
    "properties": {},
    "colors": {
      "toolbar": "rgb(39, 40, 34)",
      "toolbar_text": "rgb(255, 255, 255)",
      "frame": "rgb(39, 40, 34)",
      "tab_background_text": "rgb(159, 155, 155)",
      "toolbar_field": "rgb(39, 40, 34)",
      "toolbar_field_text": "rgb(230, 230, 230)",
      "tab_line": "rgb(39, 40, 34)",
      "popup": "rgb(50, 51, 44)",
      "popup_text": "rgb(230, 230, 230)",
      "button_background_active": "rgb(252, 152, 103)",
      "button_background_hover": "rgba(252, 152, 103, 0.72)",
      "frame_inactive": "rgb(0, 0, 0)",
      "icons_attention": "rgb(252, 152, 103)",
      "icons": "rgb(230, 230, 230)",
      "ntp_background": "rgb(50, 51, 44)",
      "ntp_text": "rgb(222, 221, 225)",
      "popup_border": "rgb(252, 152, 103)",
      "popup_highlight_text": "rgb(252, 152, 103)",
      "popup_highlight": "rgb(39, 40, 34)",
      "sidebar_border": "rgb(252, 152, 103)",
      "sidebar_highlight_text": "rgb(255, 255, 255)",
      "sidebar_highlight": "rgba(252, 152, 103, 0.72)",
      "sidebar": "rgb(50, 51, 44)",
      "tab_selected": "rgb(252, 152, 103)",
      "tab_text": "rgb(39, 40, 34)",
      "toolbar_field_border_focus": "rgb(252, 152, 103)",
      "toolbar_field_border": "rgba(252, 152, 103, 0.72)",
      "toolbar_field_highlight": "rgba(252, 152, 103, 0.72)",
      "toolbar_field_text_focus": "rgb(230, 230, 230)",
      "tab_loading": "rgb(39, 40, 34)"
    }
  }
}