I make use of the code cell feature a lot to section my code, but in some VS code themes the code cell divider line is pretty hard to distinguish from the background. How do I change the color of these divider lines? A solution that works on a theme-by-theme basis would be ideal.
This is indeed an issue. The color and thickness of the separator lines cannot be adjusted, and neither the separator lines nor the CodeLen button can be turned off.
You can use the Julia Cell Highlighter extension to provide separator lines with adjustable colors. Ideally, the separator lines from the Julia extension could be disabled, but currently, they can only be overlaid.