https://gitlab.com/christosangel/nord-theme-for-retext-markdown-editor
The repository above contains two files, that are kept in ~/.config/ReText project/ directory.
You can copy and paste them there, just remember to put the right directory in line 11 of ReText.conf first:
styleSheet=/home/USERNAME/.config/ReText project/style.css
You can see more in the video:
I am glad you like it. Retext is the light (and now beautiful) solution to md editing.
You can also tweak your own preferred theme if you like. If you need help doing this, don’t hesitate to ask.