hmm.. did you try that "blackbox mono theme" thing that I made?
https://www.mobileread.com/forums/sho...8&postcount=71
There was also a few notes on this post linked...
https://www.mobileread.com/forums/sho...66&postcount=2
dunno if that may help, specifically the link to
https://www.mobileread.com/forums/sho...5&postcount=70
which talks about the -cc flag fiddles for xephyr
I forget the exact syntax for starting blackbox with a theme but --help should mention it.
nice work btw,