Hey there,

I am really sorry for the delay of this reply as it is a weekend for us here.

It seems like those styling issue caused by your current preset custom styling, you can check my attached first screenshot below.

Imagine if you set Body Color to white colour, it will work fine in dark mode, but if you switch to light mode, it will caused this issue unable to see those word properly.

If you would like to use this switch mode feature in this Charm template, i would suggest you that do not apply too white and black colour for your preset colour area.

There is one more screenshot with color box sample if you have a plugin for that?

Unfortunately we do not have this such feature yet at this point of time.