A plugin to customize the syntax highlighting color scheme used in the code blocks would surely be loved by the developer community. People love choices and changing color scheme to my liking is what I always do in any code editors. So having a plugin to do that would be great. For starters, it could include the most common ones such as Monokai, Dracula, Nord, Solarized, etc.
The next improvement to this plugin would be an option to define custom color schemes by providing color codes for tokens