This is surprisingly effective and awesome. I created a (very hacky) style sheet to do this in calibre: https://gist.github.com/osuushi/6456804 https://gist.gi

This is surprisingly effective and awesome. I created a (very hacky) style sheet to do this in calibre: https://gist.github.com/osuushi/6456804 https://gist.github.com/osuushi/6456804 . It gets a bit out of alignment when a paragraph wraps to a new column or page, but over all it gets the job done. Edit: I fixed it to do one color transition per line, like the original.