Examine source code of Greyscale Red

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "Greyscale red",
  "theme": {
    "images": {},
    "properties": {},
    "colors": {
      "toolbar": "rgb(43, 43, 43)",
      "toolbar_text": "rgb(165, 165, 165)",
      "frame": "rgb(68, 68, 68)",
      "tab_background_text": "rgb(165, 165, 165)",
      "toolbar_field": "rgb(64, 64, 64)",
      "toolbar_field_text": "rgb(165, 165, 165)",
      "tab_line": "rgba(255, 0, 4, 0.43)",
      "popup": "rgb(64, 64, 64)",
      "popup_text": "rgb(165, 165, 165)",
      "button_background_active": "rgba(255, 0, 4, 0.69)",
      "button_background_hover": "rgba(255, 0, 4, 0.43)",
      "icons": "rgb(165, 165, 165)",
      "tab_loading": "rgba(255, 0, 4, 0.43)",
      "tab_selected": "rgb(90, 90, 90)",
      "tab_text": "rgb(165, 165, 165)",
      "toolbar_bottom_separator": "rgba(255, 0, 4, 0.43)",
      "toolbar_top_separator": "rgba(255, 0, 4, 0.43)",
      "toolbar_vertical_separator": "rgba(255, 0, 4, 0.43)"
    }
  }
}