yes that's a known issue. Unfortunately solving it means that the code tokenizer would have to scan the entire file to grab the correct colours which comes with a huge performance hit on large files. It's obviously possible to solve that, but not super trivial.
Also affects the MPE floating tile - and CSS doesn't appear to apply to that one so no workaround there and I want to avoid the CSS system for now anyway.
This is still an issue. I tried commenting out all the internal look and feel for drawPopupMenuBackground, including all the JUCE ones, but still the white background is there. @Christoph-Hart Any suggestions?