Examine source code of Inspired Grey

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Pro Grey",
  "theme": {
    "images": {},
    "properties": {},
    "colors": {
      "toolbar": "rgb(51, 51, 51)",
      "toolbar_text": "rgb(136, 136, 136)",
      "frame": "rgb(51, 51, 51)",
      "tab_background_text": "rgb(136, 136, 136)",
      "toolbar_field": "rgb(0, 0, 0)",
      "toolbar_field_text": "rgb(255, 255, 255)",
      "tab_line": "rgba(92, 92, 92, 0)",
      "popup": "rgb(31, 31, 31)",
      "popup_text": "rgb(255, 255, 255)",
      "button_background_active": "rgb(31, 31, 31)",
      "button_background_hover": "rgb(60, 60, 60)",
      "icons_attention": "rgb(76, 222, 255)",
      "ntp_background": "rgb(41, 44, 52)",
      "popup_border": "rgba(38, 100, 228, 0)",
      "tab_selected": "rgb(31, 31, 31)",
      "tab_text": "rgb(255, 255, 255)",
      "toolbar_field_border_focus": "rgba(38, 100, 228, 0)",
      "toolbar_field_border": "rgba(219, 24, 24, 0)",
      "toolbar_top_separator": "rgba(159, 117, 117, 0)",
      "tab_loading": "rgba(92, 92, 92, 0)"
    }
  }
}