XML and JSON Colorize for Dark Mode

As more people now use dark mode on macOS and Windows for the GUI, it's time to update our XML.Colorize and JSON.Colorize functions:

We get a new parameter DarkMode for those functions to turn on using a different color set. We not just swap black and white, but also make the colors a bit lighter.
Will come in 12.1pr1 next month.

Which would you prefer?